1. A thin triangular flap of a heart valve
5. Muck
8. Former Iraqi missile
12. To a position
13. Introductory
15. A type of cornbread
16. French for "Place"
17. Chieftain
18. An indigo dye
19. Sad
22. Faster Than Light
23. Trim
24. Coat with asphalt
26. Incantations
29. Remove the horns from animals
31. Consumed food
32. A sufferer of leprosy
34. A mixture of rain and snow
36. Permanent (abbrev.)
38. A smooth fabric
40. Covet
41. Struck with a stick
43. Ebbs
45. Conditioned Emotional Response
46. Follower
48. Custodian
50. Swear
51. Arid
52. Garland
54. Computation
61. Graphic representation
63. A type of chisel
64. Prefix indicating "Same"
65. Close
66. Anagram of "Laser"
67. Indebted
68. Classy
69. Japanese apricot
70. Grandmothers
2. Genus of the pearly-shelled mussel
3. Cook slowly in liquid
4. Swoop
5. Mother
6. Utiliser
7. Calorie-reduced eating plan
8. Resort
9. Meeting
10. A single undivided whole
11. A small wooded hollow
13. Carpet bugs
14. French pancake
21. Anagram of "Shad"
25. Field mouse
26. Water vapor
27. Insidious
28. Breed
29. A single serving of a beverage
30. At no time
31. Armored Personnel Carrier
33. Estimated Time of Arrival
35. God of war and strife (Norse mythology)
37. A list of choices
39. Pins
44. Body fluids
47. A tributary of the Missouri River
49. Boa
52. A speech affectation
53. Reflected sound
55. A type of rich soil
56. Heal
57. Tangelo
58. A midwestern US state
59. Portent
60. Gestures indicating assent
62. The last or greatest in a large series