Across
1.Mount for Cheryl White or Donna Cheek (5)
6.Lahr whose film character wished he'd only had the nerve (4)
10.Jellied garnish (4)
14.X-ray alternative (10)
16.Frankish peasants (4)
17.High school prom? (10)
18.Cook's fats (4)
19.Block cipher developed in consultation with the NSA and demonstrated to be insecure in 1999 (3)
20.Why did the deer need to wear braces? Because he had buck ___! (5)
21.City of Turkey, Asia. (5)
22.Payment mediums: Abbr. (4)
23....Sunkist product (5)
25.Shelled reptile (6)
28.Eagle wearer (7)
31.Vowels after A (5)
32.Saw people? (9)
34.Long-controversial drilling area in Alaska, for short (4)
35.An ___ Time of Hesitation: Moody (5)
36.Flute feature (4)
37.Post-apocalyptic 1987 Patrick Swayze film (9)
39.Sleepy, for one (5)
40.Part of a sail support (7)
41.Tip (6)
42.Swiss measure, 1.312 yd. (5)
43.Hear My Cry rapper Frank (4)
44.Caribbean fruit (5)
46.Outdo (5)
48.Golfer's score adj. (3)
51.Speak (4)
52.COTTAGE (10)
54.Algonquian (4)
55.Doing without. (10)
56.US __ (sneaker name) (4)
57.Summer of '42 character (4)
58.Electric-sparked waves discovered by Blondlot, 1903. (5)
Down
1.Dull (4)
3.Election Day stats. (4)
4.Capacity-crowd letters (3)
5.Terrestrial (7)
6.Vezina Trophy winners (5)
7.Rudely brief (4)
8.Take it ___. (9)
9.Mil. assignment (3)
10.Hit single off the DJ Khaled record "Victory" (how apt!) (11)
11.Heavenly body. (10)
12.French chatroom initialism that means "broken from laughing" (hidden in CONCEPT DRIVEN) (4)
13.Ancient box (4)
15.Lake Victoria discoverer (5)
21.Assoc. of a barrister (4)
22.FLATS (11)
24.Any day now (4)
25.Inclined to annoy. (5)
26.Range of the Beehive State (5)
27.OAR (10)
29.Poet's forever (5)
30.Initials in old cigarette ads (5)
32.Genesis weaponry? (9)
33.Sunday seat (3)
35.Wroclaw's river (4)
38.Sweet tree secretion (4)
39.___-friendly tuna (7)
41.Jones or Abdul (5)
43.Delta Wedding author (5)
44.Disgusting stuff (4)
45.Raison d'__ (4)
47.Beginning to form (4)
48.New Zealand bird allied to starling. (4)
49.Our House quartet, for short (4)
50.Cribbage requirement (4)
52.___ Paulo, Brazil (3)
53.Wash. agency (3)
2.Hockey goalie Kolzig