I don't know how I managed to crack this one. Took a whole lot of educated guessing, and I STILL don't get a few clues - but there are great ones here! I aspecially liked ASTRA and SERUM (even though the SERUM clue is definitely on the "mean" side of things). I know the Pokémon DURANT but I don't have enough sports knowledge to realize which player you're referring to. Overall, definitely a mean themeless, but PERHAPS not too mean for your standards.
Guy who crosses the finish line of a huge race completely out of breath but their day is about to get even worse than it has been because they're gonna see literally everyone else who also participated in the race congratulating each other, as well as two split halves of a thoroughly trampled finish line ribbon, perhaps
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Across
1A
Guy who crosses the finish line of a huge race completely out of breath but their day is about to get even worse than it has been because they're gonna see literally everyone else who also participated in the race congratulating each other, as well as two split halves of a thoroughly trampled finish line ribbon, perhaps
10A
A movie so strapped for cash it needed an ad right at the start, perhaps?
15A
Singer who let "Fame" go to your head, perhaps
16A
Writes letters to their object of affection, sending personal trinkets and, for some reason, hair, waiting to hear back from their beloved, perhaps
17A
Updates a Wikipedia page with the word "formerly", perhaps
18A
Marxist tools, perhaps?
19A
Pezzo the street vendor flipped his when a troupe of circus monkeys stole his inventory of head toppers, perhaps
20A
St. that every SEC football fan loves to hate on, perhaps
21A
Dealt with biblically, perhaps
22A
Place where Adam got his rib removed... for reasons (perhaps)
24A
Historical record, perhaps (#TeamBadonkadonk)
28A
Option for Agent 47 for any given hit, perhaps
29A
Some brides use these for the spinny-making (perhaps?) (perhaps)
31A
Ice cream flavor, perhaps
32A
Internet _ea, perhap
33A
This, the green finch, linnet bird, and blackbird could not teach Joanna Barker how to sing worth a lick. (Fucking fight me. - A) (uh ... perhaps)
37A
Performance issues for Tom Brady, perhaps?
38A
Make like a Jenga tower, perhaps?
39A
Something you can't really do all that well with a 360 noscope, perhaps
40A
Something some folks want in a grape for some reason (pERHaPs)
41A
Beaver-ish, perhaps
45A
Modern classic film, perhaps (with "The")
47A
___? I hardly know 'em! Why would I place them on a pan at high heat and - OH. (Perhaps you should have used your context clues, Ariel? - F)
49A
Sounds peaceful enough, but it's perhaps only a piece
50A
Like that one gaudy monument to that whole white supremacist state setup trail thing, perhaps (Wait, what do you mean there's an H in that one? Fuck it, we'll do it live - A)
52A
Tape pictures of a cherry, bar, and lemon respectively to an unplugged slot machine, take away your friend's glasses, and give them a bag of quarters, perhaps
54A
What many were when this show went off the air, perhaps
55A
Fuck / kill alternative, perhaps
56A
Turn into a constellation, perhaps (wait what do you mean "2 wds." (wait what do you mean "spice" (wait what do you mean "that's not how that word would be spelled anyway"))) (hecker I told you all that last week)
59A
It could be spitting, perhaps
60A
Capital for a property leech, perhaps
61A
Drives to Foodcomaville, perhaps
62A
Like sourdough starter sales during early COVID times, perhaps fittingly
Down
1D
"Mercy ___ out." ("The Crucible" stage direction, perhaps)
2D
Brand that everyone gets mixed up with a Native American tribe and definitely not just Frisco or the grid constructor, perhaps
3D
Digest digester, perhaps (Aaaaaaand "Your Flag Decal Won't Get You Into Heaven Anymore" is stuck in my head again - A)
4D
Plea from some movie-goers, perhaps (Hey, Frisco, by some chance do two of these movie-goers happen to be named Tom Servo and Crow T. Robot? - A) (... Perhaps? - F)
5D
Composer Raine who really knocked it out of the park on her new additions to the Minecraft OST, in the opinion of Frisco and the grid constructor (no perhaps about it)
6D
Horse Country locale, perhaps
7D
"Full Frontal" host, perhaps
8D
Poetically ahead of, perhaps
9D
Folks who get an earful for your room smelling skunky, perhaps
10D
Things Dorothy and her pals said when they got to the Emerald City, perhaps
11D
Sales of oceanfront property in Topeka, perhaps
12D
Example of a polycule, perhaps
13D
Object of desire for a scaly, perhaps
14D
Junk in the trunk and sculpted legs, perhaps
23D
Vittles for sevens, perhaps
25D
Smarter, perhaps
26D
What Frisco said to this grid's constructor when they asked "What's that Pokémon that's also the name of a basketball player?", perhaps
27D
Ivy feature, perhaps
30D
Pan without a pan, perhaps
34D
Material that Billy Joel's house is made of, perhaps
Fictional Musketeer who later became a Jesuit (Yeah, I got nothing to "perhaps" about here. Do y'all think Ross and Parker got the overall joke? - A) (Perhaps. - F) (Perhaps. - S)
42D
Ironic sign for someone who ate their sibling in utero, perhaps
43D
Tries to undo some of the damage done only to realize it's smudging and you're just going to have to use a pen on your crossword puzzle, perhaps
44D
Consequence of an April 20th well-observed, perhaps
46D
Onramp direction, perhaps
48D
Amusement, perhaps
51D
Reasons to see Macaroni and Cheese and Cotton Candy in the same box, perhaps
53D
"I lost the ___" (Perhaps this is a tired angle)
56D
Sign of a smash, perhaps
57D
Lower-tier amps go up to this, perhaps
58D
Oh ___ (exclamation made by SMM troll level players, perhaps)