Theme: Monday, Monday - Yes, yes, six fun things to say.
19A. Capital of American Samoa : PAGO PAGO. Atlas image.
51A. South Pacific resort island : BORA BORA. Another Atlas image.
9D. Hawaiian food fish : MAHI MAHI. Image, the way I like to see it.
10D. "Va-va-voom!" : "HUBBA HUBBA!". An Americanism from WW II, a shout in appreciation of a pretty girl. Unknown origin.
27D. Washington city famous for sweet onions : WALLA WALLA. Map.
37D. Disease caused by vitamin B deficiency : BERIBERI. From Sinhalese, by reduplication from beri - weakness. Sinhalese - of or pertaining to Sri Lanka. The only one word entry.
ArgyleArgyle here. A good offering from our wunderkind constructor. Interview. Solid entries, with a few words that if you don't know already, how did you get this far. Emil Jannings, I'm looking at you.
Across:
1. Poi maker's need : TARO
5. Sudden twitch : SPASM
10. "Rumour __ It": Adele song : HAS
13. Muffin ingredient : BRAN
14. Knee-to-ankle bone : TIBIA
15. Free of contaminants : PURE
16. Email folder : SENT
17. Old Testament patriarch : ENOCH
18. New York City theater award : OBIE
21. Weather map air pressure line : ISOBAR
23. Green and Gore : ALs
24. Nebraska city : OMAHA
25. Lumberjacks, often : SAWERS
29. With 43-Across, shrinking Asian lake : ARAL
30. Oft-replaced joint : HIP
33. Disneyland shuttles : TRAMS
34. Train station posting : SCHEDULE
36. Wrinkly citrus fruit : UGLI
37. Persian faith that promotes spiritual unity : BAHÁ'Í
39. Kinda sorta : A BIT
40. Archer's target : BULL'S EYE. What's the consensus on "The Hunger Games".
42. Chance for a hit : AT BAT
43. See 29-Across : SEA
44. Greek god of war : ARES
45. "__ as she goes" : STEADY
46. Collaborative websites : WIKI's. The base word is from Hawaiian.
48. One may be SWAK : LTR. (letter)
49. Like the darkest maple syrups : GRADE B. Link. Darker = more flavor.
56. Pack of quarters, e.g. : ROLL
57. Virtuosic piano work : ETUDE. I would think there are some that aren't virtuosic; it's just we don't hear about them (and a good thing).
59. Say and mean : AVER
60. Competent : ABLE
61. Ruffles chip feature : RIDGE
62. Lightsaber wielder : JEDI
63. Arthur of "Maude" : BEA. Don't get her ruffled.
64. Magnified map detail : INSET
65. Yankee slugger, to fans : A-ROD
Down:
1. Cookbook abbr. : TBSP
2. Geometric calculation : AREA
3. Pushed the doorbell : RANG
4. Not snowed by : ONTO
5. Makes off with : STEALS
6. Worrisome engine sounds : PINGS. From using too low a grade of gas or the timing is off.
7. Peek ending : ABOO
8. Incite to pounce (on) : SIC. Oh, the [sic] is pronounced seek; I did not know that. This "sic" is pronounced sick even though it came from 'seek'.
11. Opera showstopper : ARIA
12. Futurist : SEER
15. Bear who loves "hunny" : POOH (Winnie)
20. Most golfers' goals : PARS
22. Red tag event : SALE
24. Black-and-white ocean predator : ORCA
25. Hard pencils to sharpen : STUBS
26. Debate : ARGUE
28. Oscar winner Jannings : EMIL. But what else do you know about him? Link.
29. Fire remnants : ASHES
31. Homer epic : ILIAD
32. Not worth the bother : PETTY
35. Go out with : DATE
38. Roll call replies : AYEs
41. Drink with sashimi : SAKE. Sashimi - raw fish cut into very thin slices.
42. Gillette razor : ATRA
45. Space between curbs : STREET
47. Just sitting there : IDLE
48. Ski resort building : LODGE
49. Snatch : GRAB
50. Judge Judy's garb : ROBE
51. Blossoms-to-be : BUDS
52. Cabo's peninsula : BAJA. Cabo San Lucas together with San José Del Cabo is known as Los Cabos. Capo means cape. Map
53. So last year, as a fad : OVER
54. Start again : REDO
55. Desertlike : ARID
58. __ Pan Alley : TIN
Argyle