Theme: Easy as A, B, C - But that D might get you.
18A. Fun runs, often : ONE-K RACES
26A. Mobile phone system that introduced SMS texting : TWO-G NETWORK. (second-generation network) (SMS - Short Message Service)
41A. Film that requires special eyewear : THREE-D MOVIE
54A. Youth organization with a clover emblem : FOUR-H CLUB
Argyle here. I'd say three out of four clues are Monday level, but oh! that fourth.
Across:
1. Makes wet : DAMPS
6. Second half of a record : SIDE B
11. "Alley __" : OOP. OOP OOP OOP
14. Praise mightily : EXALT
15. Former "American Idol" judge Abdul : PAULA
16. Depot: Abbr. : STA. (station)
17. One-over-par score : BOGEY
20. Miffed state : SNIT
21. The "I" in MIT: Abbr. : INST. (Massachusetts Institute of Technology)
22. Target rival : KMART
23. 1989 French Open winner Michael : CHANG. When he won the French Open in 1989 at the age of 17 years and 4 months, he became the youngest male player to win a Grand Slam singles title.
25. Illinois city symbolizing mainstream America : PEORIA. "Will It play in Peoria?"
29. In the know : AWARE
30. Dinghy pair : OARS
31. Spanish sun : SOL
34. 1492 ship : NINA
35. Spot for a bracelet : WRIST
37. Smokes, for short : CIGs
38. "__ be an honor!" : IT'D. (It would be)
39. Literature Nobelist Bellow : SAUL
40. World-renowned : FAMED
44. Arrive on horseback : RIDE UP. More breakfast friendly than the other kind of "ride up".
47. Of the ear : AURAL
48. Suggestion box suggestions : IDEAs
49. Comfy and cozy : SNUG
51. Tibetan priest : LAMA
56. Put on the tube : AIRED
57. Inc. kin : LLC. (limited liability company)
58. Wear away slowly : ERODE
59. Triangular river formation : DELTA. Formed by upstream erosion.
60. Language ending : ESE
61. Knight mare? : STEED
62. Laundromat appliance : DRYER
Down:
1. Belles at balls : DEBs. (debutantes)
2. Nerve cell transmitter : AXON
3. Potter's stick? : MAGIC WAND. It was Potterhead weekend on AMC.
4. Superabundance : PLETHORA. Ollivander's Shop has a plethora wands.
5. Messy digs : STY
6. Dish cleaner : SPONGE
7. Fleming and McKellen : IANs. An author and an actor.
8. Song for two : DUET
9. Yellowstone Park grazer : ELK
10. Carnival pitchmen : BARKERS
11. Tinseltown trophy : OSCAR
12. Cheri of "SNL" : OTERI
13. Linguini or fettuccine : PASTA
19. Wild way to run : AMOK
21. Roadside shelter : INN
24. __ of Reason : AGE. The Age of Reason; Being an Investigation of True and Fabulous Theology is a pamphlet, written by Thomas Paine and published in three parts.
25. Seaside city : PORT. Not every port is seaside nor is every seaside city a port.
26. Twerp : TWIT. No need to call names.
27. Picturesque fabric : TOILE
28. "Who __ that masked man?" : WAS. "That was the Lone Ranger!" "Hi-Yo, Silver!"
29. "Wheel of Fortune" buy : AN I
31. Likewise : SIMILARLY
32. S-shaped molding : OGEE
33. It made Leary bleary : LSD
35. Hypothetical time irregularity : WARP. Funny, coming right after LSD.
36. Be contrite about : RUE
37. Cleveland NBA player : CAVALIER. As of Saturday, so is LeBron James.
39. Tells to be quiet : SHUSHes
40. Part of FWIW : FOR. (For What It's Worth)
41. Scotch tape target : TEAR. Double-sided can be used to hold green dresses in place.
42. Did some finger painting : DAUBED
43. Coffee holder : MUG
44. Hunting weapon : RIFLE
45. Objects of devotion : IDOLS
46. "Little __ Coupe": Beach Boys hit : DEUCE
49. Gin fizz fruit : SLOE
50. Naked : NUDE
52. Apportion, with "out" : METE
53. Hebrew winter month : ADAR
55. Old PC monitor : CRT. (cathode ray tube)
56. Toss into the mix : ADD
Argyle