1. Couch
5. Cognizant
10. Formally surrender
14. Bulwark
15. Volumes
16. Beasts of burden
17. Muscle-building exercises
19. WW1 plane
20. Church bench
21. Twangy, as a voice
22. Portents
23. Gist
25. Classical Greek
27. Arctic bird
28. Conscript
31. New Zealand native
34. Layers
35. Old World vine
36. Angle of a leafstalk
37. Aches
38. Leg joint
39. Martini ingredient
40. Internment camp
41. Indications
42. Cosmetic
44. Make lace
45. Makes coins
46. Quiet
50. Shoe stud
52. Assists
54. Arrive (abbrev.)
55. Parental sister
56. Alteration
58. A Maori club
59. Kidney-related
60. Backside
61. Figure (out)
62. Befuddle
63. Low in pitch
2. Fertile areas
3. Discharges
4. A high alpine meadow
5. Assault
6. More awful
7. Dogfish
8. Leaning back
9. S
10. Interstellar
11. Anticipating
12. University administrator
13. Terminates
22. Burden
24. Nobleman
26. Poems
28. Of a pelvic bone
29. Not odd
30. Visual organs
31. A magician
32. Allies' foe
33. Balms
34. Surrounded by walls
37. Short golf shot
38. Go fly a ____!
41. Chip dip
43. Gap
44. Jot
46. Flower part
47. Nigerian monetary unit
48. Pass over
49. Anagram of "Sneer"
50. Hats
51. Hawaiian feast
53. Musical group
56. Genus of macaws
57. Bar bill