Theme: Peanut Butter - but no jelly. Two word entries that start with a P & B.
60D. "America's largest classroom" network ... or, read as a plural, a hint to 20-, 28-, 46- and 53-Across : PBS. (Public Broadcasting Service)
20A. Ursine kiddie-lit character with a battered suitcase : PADDINGTON BEAR
28A. "Love Is a Battlefield" rocker : PAT BENATAR
46A. Superman's "dressing room" : PHONE BOOTH
53A. Venerated dancer : PRIMA BALLERINA
Argyle here. Feel free to come up with your own "PB's".
Across:
1. Sourpuss' expression : SCOWL. The look anon gets when he sees PLED.
6. Greek god of love : EROS
10. Shakespeare's nickname, with "the" : BARD
14. Finnish telecommunications giant : NOKIA. Wiki Site
15. Egg holder : NEST
16. Three-part cookie : OREO
17. Chorus in church : AMENS
18. Cuba, to Cubans : ISLA. (Island)
19. Campus head : DEAN
23. Low-fat, as milk : SKIM. Bzzzt! Skim is no-fat.
24. Fall behind : LAG
25. Missile storage facility : SILO
34. Tracks down, as a UPS package : TRACES
36. Bakery fixture : OVEN
37. LPGA golfer Michelle : WIE
38. Puts on the line : RISKS
39. Termination : END
40. Skip over in pronunciation : ELIDE
42. Biblical beast : ASS
43. Ambassador's skill : TACT
45. Valued (at) : PRICED
49. Truman's first lady : BESS. (Elizabeth Virginia "Bess" Truman (née Wallace)) First Lady should be capitalized, IMHO, as a title preceding a name.
50. Higher than, in poetry : O'ER
51. Parisian lover's word : AIME
60. Answered a charge : PLED
61. __ horse: long shot : DARK. No dark horse this year to derail American Pharoah.
62. Prom gown material : SATIN
63. Fillet's lack : BONE
64. New York canal : ERIE
65. Court reporter : STENO
66. Sheltered Greek promenade : STOA. More of a mid-week word but we've had it on Monday before.
67. Like a battery needing a charge : DEAD
68. Saudi Arabia neighbor : YEMEN
Down:
1. Simple fastener : SNAP
2. Unconscious state : COMA
3. Approved : OK'ED
4. Airport breeze indicator : WINDSOCK
5. High-tech eye surgery : LASIK
6. Hard puzzle : ENIGMA. Not today.
7. Get some shuteye : REST
8. Norwegian capital : OSLO
9. The Hulk's co-creator : STAN LEE
10. Hispanic grocery : BODEGA
11. Region : AREA
12. Backside : REAR
13. Dodgers manager Mattingly : DON
21. Puppy bites : NIPS
22. Large cloth sign : BANNER
25. Camera attachment : STRAP
26. "When __ Eyes Are Smiling" : IRISH
27. Wrangler's rope : LASSO
29. Kemo Sabe sidekick : TONTO
30. Skivvies brand : BVD
31. A couple of times : TWICE
32. Senate staffers : AIDES
33. Marsh grasses : REEDS
35. Think highly of : ESTEEM
39. Author Umberto : ECO. See 66-Across.
41. Set free : LIBERATE
44. Rubbed roughly : ABRADED
45. Golfer Mickelson : PHIL
47. "Search me" : "NO IDEA"
48. Had a heart-to-heart : TALKED
52. Like Buffalo wings, eating-wise : MESSY
53. Scheme : PLOT
54. Nevada gambling mecca : RENO
55. Devoid of artwork, as walls : BARE
56. Opera solo : ARIA
57. List entry : ITEM
58. Common opening time : NINE
59. In a short time, poetically : ANON
Argyle