Particular type of double-jointedness, potentially useful for getting a ride
21A
"She checks out Mozart while she does ___ Bo" ("Drops of Jupiter" lyric)
22A
Kind of tea
23A
Little lie
26A
Harsh criticism
29A
"Te ___" (hymn)
33A
1969 comedy adapted from an Arlo Guthrie song
36A
Voice below soprano
37A
Message on a cellphone
38A
Aleppo's country
39A
Come clean, with "up"
41A
Street ___
43A
Some PhD possessors
46A
Insurance co. for military families
48A
Pennsylvania port city
52A
2004 Carbon Leaf hit with the lyric "Well I hate to be a bother / But it's you and there's no other, I do believe" (talk about a middle-school anthem... this is really taking me back)
56A
Fill completely
57A
Reveal accidentally
58A
Golf bag item
59A
"And after that..."
61A
Dir. opposite NNW
63A
Response to "Is this going to work?"
71A
Basic belief
72A
Not tight
73A
Composer Stravinsky
74A
Students may be running on none of it
75A
Most of the contents of Pandora's box
76A
Residents of a dairy farm
Verticali
1D
Baseball bat wood
2D
"Super Mario Galaxy" platform
3D
Doc. to visit for a strep test
4D
Breakaway group
5D
Douglas Adams and Christopher Hitchens, for two
6D
Architect I. M. ___
7D
Deer relative
8D
Certain poet
9D
Pirate's pet
10D
One of five in "Le Bourgeois gentilhomme"
11D
"Religio Laici" poet
12D
Debtor's note
13D
Opposite of masc.
14D
Black History Month mo.
19D
Own
20D
Actress Ward
23D
Org. for high traffic situations?
24D
Unwell
25D
Took the bait
27D
Very French?
28D
"Oedipus ___" (song by Tom Lehrer... or, okay fine, a play by Sophocles, but I prefer the song)
30D
A tin one isn't an asset for a musician
31D
Prefix with verse or corn
32D
Subway system where riders can pay with a CharlieCard
34D
Plant that sounds like it grows the source of what students are probably running on instead of 74-Across
35D
Employ
40D
Night school subj.
41D
Actor Reiner of "It's a Mad, Mad, Mad, Mad World"
42D
Crunchy salad vegetables
43D
Thx partner
44D
Narrow inlet
45D
Frequently, in verse
46D
Sir Peter who won Best Supporting Actor for his role in "Spartacus"
47D
"Help!"
49D
Rodent often unfairly blamed for the Black Death
50D
Anger
51D
Part of a needle or a hurricane
53D
Zeno's home (which happens to an anagram of another piece of crosswordese: ALEE)