Theme: Fluff Up
16. Advocacy group descriptor : SPECIAL INTEREST
22. Decathlon event : JAVELIN THROW
51. Draw upon : CALLIN TOPLAY
60. 1999 Winona Ryder drama set in a mental hospital : GIRL INTERRUPTED
40D. Dryer screen used to "catch" a hidden word in 16-, 22-, 51- and 60-Across? : LINT TRAP
Another fun and stellar offering from our C.C. Two impressive grid-spanners. All across theme answers, with a downer reveal, so to speak.
Across:
1. Swelled head : EGO
4. Short-lived fashions : FADS
8. Tennis venue : COURT
13. Color similar to khaki : TAN
14. Bowling venue : ALLEY. Apt for a Burnikel puzzle.
15. Florida senator Marco : RUBIO
19. Remove from power : OUST
20. Pyramid scheme, e.g. : SCAM
21. "Can't Fight This Feeling" band __ Speedwagon : REO. From Wikipedia: "They named the band REO Speedwagon, from the REO Speed Wagon, a flatbed truck Doughty had studied in transportation history, and the initials are those of its founder Ransom E. Olds. Rather than pronouncing REO as a single word as the motor company did, they chose to spell out the name with the individual letters each pronounced ("R-E-O")." Another classic, below.
26. One in Montréal : UNE
27. Period often named for a leader : ERA
28. Disruptive forum commenter : TROLL
31. Pub projectile : DART
33. Actor Sharif : OMAR
36. Two-dimensional calculations : AREAS
38. Mighty Dog shelfmate : ALPO
39. Kathmandu's country : NEPAL
41. Apple juice eponym : MOTT
42. Bathroom bars : SOAPS
44. Freeway hauler : SEMI
45. Tend to a simmering sauce : STIR
46. Raise a stink : GRIPE
48. Gerund syllable : ING
50. __ roll: winning : ON A
55. Toss in : ADD
58. Bread with tikka masala : NAAN. Recipe.
59. Wiggled digits : TOES
65. Bath-loving Muppet : ERNIE
66. Zagreb native : CROAT
67. "I don't __ you anything!" : OWE
68. Kia headquarters city : SEOUL
69. URL opener : HTTP
70. Archery bow wood : YEW
Down:
1. Martians, e.g., for short : ETS
2. Hole in one's story : GAP
3. Bogey : ONE OVER PAR. Golf.
4. Old-fashioned clothes presser : FLAT IRON
5. Every last bit : ALL
6. Jefferson, religiously : DEIST
7. Lip-__: mouth the words : SYNCH. Don't usually see an H at the end.
8. Coffee-mate competitor : CREMORA
9. "It can be __ little secret" : OUR
10. Lyft alternative : UBER
11. Climb : RISE
12. Dog that bit Miss Gulch : TOTO
14. Supermarket walkway : AISLE
17. Pool stick : CUE
18. Sharp-tasting : TART
22. Last Supper traitor : JUDAS
23. Like old watches : ANALOG
24. Roster entries : NAMES
25. Rewards for early birds? : WORMS
29. "Anna Karenina" novelist : LEO TOLSTOY. Nice first and last name here.
30. Salma Hayek or Sofia Vergara : LATINA
32. Debate issue : TOPIC
34. Gibbon, e.g. : APE. Gibbons are apes in the family Hylobatidae. Gibbons freak out over rodent:
35. Insert with force : RAM IN
37. Wander from the path : STRAY
43. Droopy-eared pooch : SPANIEL
47. Stylish vigor : ELAN
49. Date, with "with" : GO OUT
52. Bathroom stall fastener : LATCH
53. Motionless : INERT
54. Oomph : PEP
55. Quite some time : AGES
56. Threatening : DIRE
57. First Bond movie : DR. NO
61. Lucy of "Elementary" : LIU
62. Poppycock : ROT
63. Farm female : EWE
64. Morning moisture : DEW