Puzzle
ACROSS 1 Cellos' neighbors
7 Clutch or duffel
10 Iowa home of a Big 12 team
14 Highly skilled
15 Grandpa Simpson
16 Mama's mama
17 Notices a backward warning in "The Shining"?
19 Class where tangents are important, briefly?
20 Profs' helpers
21 (This is heavy!)
22 Neutral tone
23 Game with Skip and Reverse cards
24 Places for nursing babies
25 Poseidon's realm
29 Encircle
31 Pet such as a manx
32 Ode to one's favorite cuts of beef?
36 Vigor
37 Former Egyptian leader hidden in "sets a date"
38 Vatican City inhabitant
41 Mist that makes you look like president Harry?
44 '90s music purchases
46 First or last part of 40-Down
47 In unison
48 Official language of Oman
50 ___ to lunch
52 Any "Friends" episode, in 2020
53 50-50 choice for a test taker
55 Bit of in-flight info
58 Rapunzel has lots of it
59 Gallery manners?
61 Stepping on a crack, some say
62 Aquarius' opposite sign
63 Broccoli rabe
64 "Hey, you!"
65 Where to enter a PIN
66 Like laced punch, and a hint to what's been added to 17-, 32-, 41- and 59-Across
DOWN
1 Expansive
2 Product of a brainstorm
3 Mine finds
4 ___ Angeles Sparks
5 BB shooters
6 Back of the boat
7 Rustic venue for a hipster wedding
8 Border on
9 Prized stone
10 Pays to play
11 Former governor whose sons are Andrew and Chris
12 Head-scratcher
13 Most wise
18 Pair
22 A gym buff's is buff
24 Country star Eldredge
25 Sphere
26 Dog that rhymes with "grr"
27 Diplomatic representatives
28 Each
29 "Waiting for ___" (Beckett play)
30 Nobelist Pavlov
33 Abraham nearly sacrificed him
34 Deposits, as an egg
35 Conservatory work?
39 Give a one-star review, say
40 180 degrees from WSW
42 Harness strap
43 Certain loan specification
44 Server on skates, perhaps
45 Aspirations
49 Beyond well-done
50 Dated
51 They may update an app
53 Ridge on a banjo
54 Physics particle
55 Killmonger who battles T'Challa
56 Song
57 Surrounded by
59 ___ mode
60 Big name in nail polish
Solution