Inspired by the song "Anagram" from the outstanding musical "Kimberly Akimbo" (strongly recommend!) I know the theme content is light but hope it's an enjoyable solve nonetheless. (Somebody test solved, but they didn't share any comments so I guess it's not too bad to make public.) Feedback appreciated as always! Cover photo from Joe Shlabotnik on Flickr.
Really fun puzzle, Sendhil. I hadn't realized there was a Tollywood...had only known of Bollywood. In your clueing, consider offering fewer examples to decrease your character count. For example, "Diaper, in Dover or Durham" could be "Dover diaper" or "Durham diaper", and you could cite just one film instead of three in the 41-Across clue. I hope you take this as it's meant: a helpful suggestion, and not criticism! (It's feedback I myself have gotten in my 11-month-long construction journey!)
Dey who went from "The Partridge Family" to "L. A. Law"
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Orizzontali
1A
Dey who went from "The Partridge Family" to "L. A. Law"
6A
Secret supply
11A
Boxing Day time zone in Boston
14A
Millie Bobby plays her in the movies based on the series by Nancy (Springer)
15A
Quvenzhané Wallis plays the title role in this 2014 movie musical
16A
Pencil that's almost exhausted
17A
"Oh, with the turn of a letter / Oh, everything's better / I wonder how you see the things you see / With a change of ___________ / Nothing's defective / I wonder what you see / When you look at me" ("Anagram" from "Kimberly Akimbo")
19A
It may be traded for tit
20A
Movie camera lens settings (for transmission, rather than focal length)… or stations of a historic NYC subway line
21A
Semitic language spoken in the smallest member state of the EU
23A
Earth-friendly prefix
24A
Perennial shrub whose flowers go well with mojo (garlic sauce)
27A
Tollywood wraps
28A
Cow's milk : cheese :: soy milk : ____
30A
Domain
32A
Nasal mucus, informally
33A
"The Hate U Give" heroine (or Ringo, Bart, or Edwin)
35A
"The Price Is Right" announcer Johnny who cried "Come on down!"
37A
"I like the way you see the world / I like your ___________ / A little sly, a little strange / A little bit askew / I like the way you look at life / And think outside the box / A little odd, a little off / A bit unorthodox" ("Anagram" from "Kimberly Akimbo")
39A
Rapper Shakur
40A
Gabriel's fellow archangel
41A
Richard of "Pretty Woman", "Chicago", and "Arbitrage"
42A
Big name in printers
44A
Pole, Croat, Bulgarian, Bosnian, Czech, Serb, Slovene, or Slovak
48A
Monsoon manifestations
50A
Pantyhose brand that used a ZZ Top cover in an ad campaign
52A
Get older
53A
Gallery event
55A
Historic Irish province whose nine counties span two countries
57A
Rapper of the 2008 hit "Paper Planes" (who goes by Mathangi Arulpragasam offstage)
58A
As in the much-memed line delivered by The Dude in "The Big Lebowski": “Yeah, well, you know, that's just, like, ____ _______, man.” (2 wds.)
61A
It's mightier than the sword
62A
Employed
63A
Food from heaven, in Exodus
64A
It's longa, even if vita is brevis
65A
Silly
66A
Pitchman's pitch
Verticali
1D
Group of seven
2D
Intl. cultural org. with Goodwill Ambassadors that designates World Heritage Sites
3D
Somewhat (2 wds.)
4D
In addition
5D
Diaper, in Dover or Durham
6D
Anatomical pouch
7D
Frequent buy for Wile E. Coyote or the MythBusters
8D
20 Questions category that's neither vegetable nor mineral
9D
Member of the Trimurti (Hindu trinity) who may be depicted as benevolent, fearsome, or dancing
10D
Faces' foes, in the pro wrestling kayfabe
11D
Formal, and somewhat forbidding, invitation
12D
The act of attempting to persuade (it can be moral)
13D
Assay for infectious bacteria performed on skin or blood
18D
Company serving auto, home, and motorcycle owners acquired by Allstate in 2011
22D
Cap adornments traditionally moved during graduation
25D
Dearly departed (1956–2018) breath mint (or candy mint) with Retsyn™
26D
Have a night on the town
29D
Annual championships in tennis and/or golf
31D
Ascending (2 wds.)
34D
Hermana de la mamá
36D
"The dog ate my homework" or "this never happens", often
37D
English Protestants who sought to remove Roman Catholic practices
38D
Toad's "longtime companion"
39D
More given to weeping
41D
Robert Jebediah Freeman, Jay Pritchett, or Abe Simpson, on TV
43D
Chest cavity membrane that ensheathes a lung
45D
First course covering conjugations (and declensions)