1. Missing from the Marines, say
2. Suez or Panama
3. Swelling
4. Parts of stairs
5. Male offspring
6. Sun, e.g.
7. Fishing, perhaps
8. Aussie "bear"
9. Hawaiian greeting
10. Understandings
11. Boris Godunov, for one
12. Derelict ship
13. Congers
18. Advocate
19. Short for types of periodicals
24. Heroic poem
25. Floors
27. Wood sorrels
29. "Gladiator" setting
31. OPEC member
32. "Your majesty"
33. ___ Clinic
34. European spouter
35. The Beatles' "___ Leaving Home"
36. A hack
38. Water sport acronym
41. A help
42. Egyptian fertility goddess
43. "Good grief!"
48. High-five, e.g.
50. Manage
51. Relating to an anode
53. "La Bohème," e.g.
55. Baghdad resident
56. Play, in a way
57. Flight data, briefly
58. Drop down?
59. One way to stand by
61. Brio
63. So-so
65. Female
66. Big bang cause
67. Get a move on