A new pairing of constructors brings us a different variation on the remove letters theme. I wonder if Kathy and Lewis collaborated after a crossword tournament encounter?
AERIALS, AMASSED, ANNE RICE, DEERSKIN, PINENUTS and, SOUL FOOD.
20A. What included a top hat, for Lincoln?: GETTYSBURG
26A. Unvarnished inventions?: BARE NAKED L
43. Citi Field catcalls?: FLUSHING ME
53A. Joe-induced speaking clarity?: CAFFEINE
The reveal:
47D. Ubiquitous YouTube button ... and a hint to four long Across answers: SKIP AD.
Across:
1. "... harmony in the motion and magnitude of the __ ... ": Copernicus: ORBS. While Copernicus wrote extensively about orbs and the planets moving around the sun, I believe it was Kepler to whom the quote should be attributed.
5. Out, perhaps: A BED. He got home and he was out like a light.
9. Maintain: CLAIM. I maintain that I am unique in every way.
14. Stable newborn: FOAL. A baby horsie. Though they often aren't that stable in the stable. LINK.
15. Particle in a beam: MOTE. There is so much more to this than I knew - a game Destiny and reading from the Christian Bible as well as what I thought.
https://www.youtube.com/watch?v=zX8UU8UBQhw
16. Lifetime parent: A AND E. One of the most confused and confusing networks. LINK.
17. Asian tourist city: AGRA. Home of the Taj Mahal.
18. Initial game payment: ANTE.
19. Lengthy sentence: RUNON. I love RUNON sentences as has often been pointed out here at the blog both my detractors and my fans.
23. Prohibition __: ERA.
24. Support gp. founded under FDR: USO. While the UNITED SERVICE ORGANIZATIONS primarily bring to mind Bob Hope, they are so much more.
25. Like Yosemite's El Capitan: SHEER.
31. P&L report column: YTD.
32. Symbol of ease: PIE.
33. Part of a baby's repertoire: COO.
34. Stops lying?: RISES.
37. One often stands alone in a split: PIN. A quick CSO to Boomer and TTP and a reminder of the unknown to me -PIN OAK.
38. Devote, as time: SPEND.
40. Gp. inducted into the Rock and Roll Hall of Fame in 2017: ELO.
41. They're often seen on trees: KIN. Hah hah - family trees, not Pin Oaks.
42. Disposed of: ATE.
48. "The Night They Invented Champagne" composer: LOEWE.
49. Mentalist Geller: URI.
50. Sch. in Manhattan: KSU.
57. Get around: AVOID.
58. Food stamp?: USDA.
59. 67, for Beethoven's Fifth: OPUS.
60. Invisible turnout?: NOONE.
61. Unlikely: TALL.
62. Olive Oyl's mother: NANA.
63. Wound up: ENDED.
64. Goes after: SUES.
65. Go around in circles?: EDDY.
Down:
1. 18 or 21, typically: OF AGE.
2. Court rival of Rafael: ROGER.
3. Bill for shots: BARTAB.
4. Picket fence piece: SLAT.
5. Assembled: AMASSED.
6. Small chocolate-covered candy: BONBON.
7. Classic accusation: ETTU.
8. Moccasin leather: DEERSKIN.
9. Asked for ID: CARDED.
10. Victory wreath: LAUREL.
11. Lestat de Lioncourt creator: ANNE RICE.
12. Promises at the altar: I DOS.
13. YMCA part: MENS.
21. Mongolian tents: YURTS.
22. Butter used to deep-fry samosas: GHEE.
27. Agreement word: AYE.
28. Mimicry: APING.
29. Geological time span: EON.
30. Scandinavian roofing material: SOD.
34. Whistle-blower: REF.
35. Down with the flu: ILL.
36. Deep South cuisine: SOULFOOD.
37. Pesto ingredients: PINENUTS.
38. Poker-faced: STOIC.
39. Nave seat: PEW.
41. New Zealand bird: KIWI.
42. Reception aids: AERIALS.
44. 1959 Fiestas hit: SO FINE.
45. Followed: HEEDED.
46. Confused mess: MUDDLE.
51. Squeak or creak: SOUND.
52. Take back: UNSAY.
53. Prop for Chaplin: CANE.
54. The Bard's river: AVON.
55. Biblical hunter: ESAU. Jacob was a farmer, Esau a hunter.
56. Atmosphere: TONE.