This was crazy fun and interesting... can you check the clue for 2D? It may not match the answer, or I'm just totally out of the loop (which is OK, I've accepted that) - keep on constructing! :)
Their Three Arrows symbol is used by modern anti-fascists and soccer fans
19A
I think he shows up after Vladimir and Estragon depart
20A
Start for a lot of drama?
21A
How do you know when a joke is a dad joke? When it becomes a ___.
22A
The "good" sterol
23A
"if natalie portman dated jacques cousteau their celebrity ___ would be '___'" @lizzzzzielogan
26A
Slangy assent
28A
A certain "mount"; var.
29A
A vague yet menacing Will Smith movie, briefly
30A
A ___ (describing something known only by reasoning)
33A
March 2020 came in like ___ and went out like a fucking tsunami
36A
Slightly processed lunch fodder
39A
Puccini work borrowing from Sardou
40A
Like some feet (Have you considered YOU'RE the one being dirty here?)
43A
Features in windows
46A
Rabbi who got 38D, according to some tales
48A
Run
49A
Franchise which proves that strange tapes lying in cabins distributing the words of the Necronomicon is no basis for a good time
54A
Warning sound from Rex
55A
"This ___ is no more! He has ceased to be! 'E's expired and gone to meet 'is maker! 'E's a stiff! Bereft of life, 'e rests in peace! If you hadn't nailed 'im to the perch 'e'd be pushing up the daisies!!"
56A
Subjected to a stampede of fools, perhaps
58A
Bleached
59A
Beverage enjoyed at Churchill Downs
62A
Part of a phrase asking that one hush
63A
Some prosecutors; abbr.
64A
With Black, employer of a protagonist eventually designated Anticitizen One (not a dupe)
65A
Gossip
66A
Our office's Ricoh would actually do this function if it didn't jam up so often
67A
Nums. on checks
Verticali
1D
Roll fish
2D
You could describe them as "floaty"
3D
Announce
4D
Taken to a different plane of existence because that TikTok was too damn funny; slang
5D
Short smut
6D
Stable workers
7D
Transgress
8D
Tuber nugget
9D
Stargazer who made Contact
10D
The outright crappy Zumba class certainly was a workout of ___
11D
___, cowboy!
12D
In some circles you're actually not supposed to spell out this name - oh, shit, fuck, my b
13D
"Please do not fart in this ___ time machine" (I don't know, I never saw the movie)
18D
Dandy
21D
Its papers were in the papers
22D
Triangle pt.
24D
Decked out with a diadem
25D
"HOLY ___!" (I can tell you right now it's not SHIT)
27D
Axton who said Jeremiah was a bullfrog
31D
Cannabis product subject to many studies and even more sham health claims
32D
Party description I wish wasn't so overused, even for Hanukkah
34D
Prefix associated with one who shares the constructor's name
35D
His clavier certainly was well-tempered (:V)
37D
Subj. for the Paris Agreement
38D
"Isaac, get ___" (too-frequently-needed Jewish Twitter meme)
41D
Oscar stressed why being such is important
42D
In which going up up down down left right left right MIGHT unlock songs
43D
Having a role in the outcome
44D
Poolside seating
45D
Delivery regarding Luke (or Mark, or John, or Matthew, or Paul)
47D
A need if you're enjoying some of the Colonel's Best