Theme: For your eyes only - Four ways to use your eyes.
17A. Understand, finally : SEE THE LIGHT
23A. Zone out : STARE INTO SPACE
38A. Revival leader's query ... and hint to the starts of 17-, 23-, 49- and 60-Across : "CAN I GET A WITNESS?"
49A. Photographer's instruction : WATCH THE BIRDIE
60A. "Didn't think I could do it, did ya?!" : "LOOK AT ME NOW!"
Argyle here with Nancy again. She was here last month and returns with a smooth offering today. No pinwheel today but still a couple of long non-theme columns to tie it together. The unifier is a grid spanner right in the middle.
Across:
1. Spaghetti or ziti : PASTA
6. In different places : APART
11. What a steamroller steamrolls : TAR
14. Moral standard : ETHIC
15. Capital of Yemen : SANA'A
16. Thrilla in Manila winner : ALI
19. Caboodle go-with : KIT. (kit and caboodle) (meaning)
20. Bill at the bar : TAB
21. Tehran native : IRANI
22. German auto engineer Karl : BENZ
27. Mined rock : ORE
28. Ticklish Muppet : ELMO
29. Boom's opposite : BUST
32. ID card feature : PHOTO
35. Point de __: opinion, in Paris : VUE
42. Corp. ladder leader : CEO
43. En __: as a group : MASSE
44. Spoken : ORAL
45. WWII female enlistee : WAAC. (Women's Army Auxiliary Corps)
47. Org. with a "100 Greatest Movie Quotes of All Time" list : AFI. (American Film Institute)
56. Had a bawl : WEPT
57. Track jockey, e.g. : RIDER
58. Building wing : ELL
59. Swiss peak : ALP
63. Under the weather : ILL
64. Speck in the ocean : ISLET
65. Beethoven's "Für __" : ELISE. A dance number?
66. Lao-__: Taoism founder : TSE
67. Heart rate : PULSE
68. Thin coins : DIMES
Down:
1. Ones who won't leave you alone : PESTS
2. Really bugged : ATE AT
3. Biblical queen's land : SHEBA
4. Little songbird : TIT
5. More sore : ACHIER
6. Lion of Narnia : ASLAN
7. Sherwin-Williams product : PAINT
8. Cardio procedure : ANGIO
9. Word of support : RAH
10. Skin art, briefly : TAT
11. Seek shelter : TAKE COVER
12. Flared skirt : A-LINE
13. Big name in hotels and crackers : RITZ
18. Buffalo's lake : ERIE
22. Emeril catchword : BAM!
24. __ de boeuf: French roast : RÔTI. (Roast beef)
25. Alien-seeking org. : SETI. (search for extraterrestrial intelligence)
26. Underhanded plan : PLOT
29. Secretly keep in the email loop, briefly : BCC. (Blind Carbon Copy )
30. Abu Dhabi's fed. : UAE. (United Arab Emirates)
31. Suspected McIntosh relative with pure white flesh : SNOW APPLE. (Fameuse) LINK
32. TD's six : PT's. (football)
33. Gives birth to : HAS
34. What borrowers do : OWE
36. __ Today : USA
37. Subj. for some green-card holders : ESL. (English as a second language)
39. Former auto financing co. : GMAC. (General Motors Acceptance Corporation, now Ally Financial)
40. A pop : EACH
41. Roulette color : NOIR. (black)
46. Verizon rival : AT&T. (American Telephone and Telegraph Company, once)
47. Aid in a felony : ABET
48. Solidified, as plans, with "up" : FIRMED
49. H.G. who wrote "The War of the Worlds" : WELLS. This gives me an excuse to post Jeff Wayne's Forever Autumn, sung by Justin Hayward and narrated by Richard Burton.
50. Internet forum troublemaker : TROLL. "Don't feed the trolls"
51. Backpacking outings : HIKES
52. Online social appointment : e-DATE
53. Jeans material : DENIM
54. Admission of defeat : "I LOSE"
55. Cary of "Glory" : ELWES
56. Cool one's heels : WAIT
60. One of a kissing pair : LIP. Remember "Leo the Lip" Durocher?
61. Buckeyes' sch. : OSU. (Ohio State University)
62. Yale Blue wearer : ELI