If you can think of a single movie title that still makes sense without the "it" please tell me lol, but I was a little big constrained in that regard.
* With 16A16A* See 15A[-----], coming-of-age novel whose 2019 movie adaptation stars Meryl Streep and Timothée Chalamet
16A
* See 15A15A* With 16A, coming-of-age novel whose 2019 movie adaptation stars Meryl Streep and Timothée Chalamet[----]
18A
Imitating, on menus
19A
What Minnie yells when she sees a mouse in her kitchen, ironically
20A
* 2002 animated sci-fi flick set in Hawaii
26A
Dr. of the ears, but not the nose or throat?
27A
Cry for a torero
28A
* With 31A31A* See 28A[----], notable 1941 Welles film
31A
* See 28A28A* With 31A, notable 1941 Welles film[-----]
33A
Second word of "I Want It That Way"
34A
Lie I tell myself halfway through a box of Oreos
37A
Type of tree that sounds like an animal's covering
38A
Idina Menzel solo in "Frozen", and instructions for the starred clues?
39A
"__ Beso" - the official Anka song of crosswords everywhere
40A
"...Doom-pa-dee, __" (see 4A4A"__-pa, Loompa..."[---])
41A
Letters to follow monk or lack (sorry about this one)
Down
1D
Sibilant snake sound
2D
Type of pasta that Spaghetti-Os actually are (rhymes with potbelly)
3D
Not like 9D9DHe goes by Wednesday in "American Gods" (not a film, but it's so good I had to mention it)[----], 29D29DPrismatic servant of Hera [----], or 36D36DDeity of the dawn[---]
4D
Shakespearean lament (two words)
5D
Expressions of surprise (or modern spellings of 4D4DShakespearean lament (two words)[----]'s first word)
6D
Sounded like a tom?
7D
It might be bombed or made up
8D
"___ Christianity", by C.S. Lewis
9D
He goes by Wednesday in "American Gods" (not a film, but it's so good I had to mention it)
11D
Actor Wheaton
17D
Authorizes, for short
18D
"__ Capone Does My Shirts" - YA novel by Gennifer Choldenko
19D
About-face from WSW
21D
Everyone's favorite type of poem
22D
Terminator portrayer
23D
"It's important _ ___ that..." - phrase emphasizing what follows