Hey Sommersmith, this was a great puzzle with fun clues. I enjoyed the self-promotion on 65A (Listening to "Dad Joke" as we speak) and just the general vibe of the clues - gettable without pulling out the OED, but you could still learn something from them in the process (such as 9D).
Thanks for the kind words, and thanks for checking out my music! I did make a bit more of an effort with the clues for this one, so I'm glad it paid off!
Subject for a math lecturer who tends to go on tangents?
20A
He gave J.Lo a 1.8-million-dollar ring in 2019
21A
Goes (for)
22A
Constellation that's so Minor it's bear-ly visible?
24A
Johnny ___: 1860s epithet
26A
*Nickname for New York City's theater district
32A
What wonders never do
33A
"The Age of _______": 2015 Blake Lively vehicle
34A
They can restart your heart or, in romance novels, make it skip a beat
35A
"_____ to be Kind": 1979 Nick Lowe hit
37A
US gov't org. that really wants to get their hands on that little black box, in the 1992 hacker film "Sneakers"
38A
What you should let sleeping dogs do
39A
Gets going when the going gets tough?
40A
They were briefly common in briefcases, briefly
41A
Run over the allotted time
43A
Ping
44A
*Joni Mitchell tune that refers to Honolulu's Foster Botanical Garden as a "tree museum"
47A
Procedural franchise with entries set in Las Vegas, Miami and New York
48A
"How I Met Your Mother" role for Alyson Hannigan
49A
In the Bay of Fundy, it causes a regular water level change of over 50 feet
52A
ABC prime-time programming block that kicked off the weekend
54A
Kendrick who was Tony-nominated at age 12
58A
Intuitive grammar rule that tells you to put size before color in this puzzle's starred entries
61A
fka
62A
In 1999 the International Olympic Committee named him Athlete of the Century
63A
You might do it with a GIF
64A
Like a crossword lover with no crosswords to solve
65A
crosshare.org/sommersmith and micahsommer.bandcamp.com, for two
66A
Soaks up the sun
Verticali
1D
Pommel site
2D
Mideast monarch
3D
Indian flatbread
4D
Thwart through clever anticipation
5D
City where the Missouri River meets the Mississippi, for short
6D
Tim who has yet to return Taylor Swift's favor and name a country song after her
7D
At its height in 2008, it was worth 170 yen
8D
Certain snow-day diversions
9D
In the Middle Ages it was usually brewed by women
10D
Parking garage, in Wisconsin
11D
Facilitate a friend's felony
12D
Crossword clues ending with question marks, usually
17D
National League ____: MLB division for 43-Down and (formerly) 5-Down
18D
Name attached to the Bank of Sweden's annual economics prize since 1968, despite one relative's claim that Alfred "despised people who cared more about profits than society's well-being"
23D
"The Misadventures of Awkward Black Girl" creator Issa
25D
"And others", in a bibliography
26D
Cedar Point roller coaster that's actually a pair of twin coasters
27D
For the whole family
28D
Bag of loot
29D
All-purpose spray in "My Big Fat Greek Wedding"
30D
"Master of None" co-creator Aziz
31D
Rising need?
32D
Person whose name might appear in a crossword puzzle, for short
35D
Something pregnant people shouldn't change
36D
In Cambodia it's worth 1/4000 USD
39D
Modern lovers
40D
Part of a pediatric clinic's waiting room, often
42D
High school for Henri
43D
Ga. city with pro baseball's last remaining Native mascot (read the room, people)
45D
Most are grown in Mediterranean countries
46D
48-Across, to Marshall in "How I Met Your Mother"
49D
Soaks up the sun
50D
Here's a thought
51D
Cranked out the tunes
53D
Respiratory organ that lets a hermit crab breathe on land as long as it's kept moist
55D
Hush-hush docs
56D
Place for a vampire bite
57D
"The ____ are not a way to make a living. They are a very human way of making life more bearable." - Kurt Vonnegut
59D
Animal : Brain :: Computer : ___
60D
"Pondering my ___": late 2021 meme featuring a wizard and a crystal ball