1. Alan of PBS's "Scientific American Frontiers" → ALDA
2. Wrapper at a Japanese restaurant → NORI
3. Steps up to, as the line → TOES
4. Right-leaning type → ITALICS
5. Super-trendy → HOT
6. Electrified Olympic weapon → EPEE
7. Collect, as rewards → REAP
8. Huggers → ARMS
9. In the style of → ALA
10. Something learned the hard way, often → LIFELESSON
11. Organization promoting international goodwill → PEACECORPS
12. Coin with 12 stars on it → EURO
15. Acting collectively → ASONE
18. Un-solid-ify → MELT
22. Be worthy of → MERIT
25. Sol's sister → LUNA
27. Toward the back of the boat → AFT
28. Big wheels in the Vatican? → POPEMOBILE
29. Ray Charles's first #1 R&B single (1954) → IGOTAWOMAN
30. Hand sanitizer eliminates the need to do this → RINSE
31. Quit → ENDED
32. Art class staple → PAPER
33. Abrupt endings, of a sort → TKOS
34. 2022 book paying tribute to a 1960s rock legend → JIMI
38. Narrow openings → SLITS
39. Big Apple debut in 2010 → IPAD
42. This clue's number, for the youngest U.S. president → AGE
44. "Lux-ur-ious!" → OOHLALA
46. Nick of "Cape Fear" → NOLTE
47. Pan in the butt? → GOAT
50. Cybersecurity concern → HACK
52. Electrical units → OHMS
53. Maze runners, sometimes → MICE
54. Universal donor's type, informally → ONEG
56. Children's author Blyton → ENID
57. Popular stick-figure webcomic → XKCD
58. Quizzes → ASKS
60. ___-cone → SNO
62. New Zealand parrot whose name sounds like a Korean automaker → KEA