1. Burrowing marine mollusk
5. 50%
9. Truth
13. Corporate image
14. More aloof
16. Freshwater mussel
17. Therefore
18. Stage
19. Not early
20. Flowerless plants
22. Surrounded
24. European mountains
26. Portend
27. Pasta dish
30. Guarantee
33. Slaughterhouse
35. File
37. Excluding
38. Keyboard instrument
41. US spy agency
42. Notions
45. Sluicegate
48. Newspaper bigwig
51. An anti-riot weapon
52. Monarch
54. Glance over
55. Requiring special knowledge
59. Not a fork or a spoon
62. Bounce back
63. Won't eat meat
65. Old Russian autocrat
66. Cicatrix
67. Swelling
68. Female chickens
69. Anagram of "Rent"
70. Glimpse
71. Border
2. Old stories
3. Exacerbated
4. By the light of the moon
5. Fashionable
6. Dull pain
7. Tropical vine
8. Variety of grass
9. Pivot
10. Nitpicky to a fault
11. Give as an example
12. Pigeon-___
15. Rule
23. Diversion
25. Swill
27. Hindu princess
28. House
29. 3 in Roman numerals
31. Acknowledged
32. Genus of heath
34. Blame
36. Long-haired wild oxen
39. Mesh
40. 1 1 1 1
43. A pneumatic horn
46. Big bag
47. Portion
49. Martini garnish
50. Ebb
53. Goes ballistic
55. Exam
56. Behold, in old Rome
57. Blacken
58. Light source
60. Canine tooth
61. Celtic language
64. No