Thanks for solving! In retrospect I certainly could (and probably should) have clued COVE differently but I like to tie clues to books/authors I really enjoy. I'm hoping ENOL is common enough fill to avoid Naticks.
Lower back-related, doubly so if you pray that your back doesn't hurt
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Horizontales
1A
Lower back-related, doubly so if you pray that your back doesn't hurt
7A
John played by Keanu
11A
Loin or shank
14A
He was know for portraying Lawrence and setting the record (since tied) for most Oscar noms without a win
15A
Organic compound type
16A
It's for when the egg comes first
17A
Actor Ving
18A
Name preceding Strauss in anthropology (and jeans)
19A
One of the M's in 3M, for short
20A
State of play, card-wise?
22A
Soviet fighter
23A
Slope of the equation y=x
24A
Infinite Shine manufacturer
25A
Game before coach pitch
27A
Linguistic kin of Sanskrit
30A
Planets, eyes, or peas, if you're feeling poetic
32A
Fittingly, you must do it before playing certain games
33A
Big name in 43 Across
35A
Popular, highly toxic shrub
37A
A major musician's young niece or nephew?
40A
Argentine football great (Barca, PSG, InterMiami)
41A
Chemical suffix, as in NaCl
42A
"___ Enchanted"
43A
"Anti-[44 Down]" of the early 20th century
45A
For some reason, acting like one is encouraged
49A
_____ steady
51A
Anthem contraction
52A
À ___ (yours, Fr.)
53A
One might be passed or put on
54A
What I want to do when entering a space full of books; what others do to get a sense of the audience
59A
___-di-dah
60A
Words before now
61A
Pass
62A
"Lord is ___?" (Matt. 26:22)
63A
Shark that sounds like an auto body shop
64A
Wit descriptor
65A
12/ (or __/12 for non-US solvers)
66A
Sierra Club co-founder
67A
Ritual spots
Verticales
1D
"Ish"
2D
Goddess of wisdom (she seems to be MIA)
3D
Persuader (or, pronounced as two syllables, one installing cable?)
4D
Award-winning Alfonso Cuarón film
5D
Hoppy quaffs
6D
Bandmate of Garcia, Weir, and McKernan
7D
Set
8D
Like death cap mushrooms (and several other kinds, as far as I'm concerned)
9D
"The Lust Lizard of Melancholy ___" (Christopher Moore - please check him out if you've never read his books!)
10D
Gustav ____, Austrian painter known for his "frank eroticism" (now that's a porn name!)
11D
Go ___ (de-briefed?)
12D
Common lens attachment
13D
One flicking a switch on and off - also a big name in wall bolts and fasteners
21D
Chess notation for a queenside castle, or Tic Tac Toe notation for a win
26D
Like an increasing number of books that might cause people to think or come to grips with inequities and injustice
28D
Joseph:___::Anton:Rushdie
29D
"Dies ___"
31D
Equivalent of 1 Down
34D
Frequent diagnosis in VA hospitals
36D
Common ground between Giuseppe Verdi and Elton John
37D
Transplant, maybe
38D
First part of the Stone Age
39D
Hall of Fame golfer whose name in English is 75 percent vowels
40D
MVA issuance
44D
"But is it ___?" (question if you're not sure you see Garfunkel in a Kandinsky)
46D
Word coined by Thomas More (his sounds pretty bad, by the way)
47D
How I'd like my pants to fit compared to how they actually fit
48D
Proctors, e.g.
50D
Ex-Senator from Texas often assigned major blame for the 2008 financial crisis (lesson learned? - nah; last year he published a book called "The Myth of American Inequality")
55D
Probably the Biblical figure most commonly included in crosswords