1. Ancient Greek marketplace
6. "The red planet"
10. Deckhands
14. Apple gizmo
15. Official crossword lotion-ingredient
16. Harp's cousin
17. "Biography" airer
18. Run down one of the "magic words"?
20. Heavy hydrogen, e.g.
22. "Relax, and that's an order!"
23. Miss. neighbor
24. Bad lighting?
25. Run down the equal pay movement?
29. Half-moon tides
33. Teen embarrassment cause
34. Stately tree
35. Howard Hughes, e.g.
36. Cloak-and-dagger org.
37. Anger
38. Armageddon
39. "O Sole ___"
40. Marsh waders
42. Fatness meas.
43. Go on a tirade
44. Sports venue
45. Run down cavalry horses?
47. Blew it
49. Sleeve occupant
50. Birchbark boats
52. Apple pie order?
56. Run down the concept of personal possessions?
58. "Nothing," in legal phrases
59. Can of worms?
60. Not false
61. Pool contents?
62. Popular steak sauce
63. Dispatch
64. Eat away at