1. Explosion
6. Modify
10. A young horse
14. Type of drill
15. Rational
16. Humdinger
17. Applied mathematics
19. "Smallest" particle
20. Angel
21. Paraphernalia
22. Heredity unit
23. Sysadmin
25. Femme fatale
26. Prostitute
30. Chess piece
32. Spiny anteater
35. A wheeled domicile
39. Political refugee
40. Excite
41. Lapse
43. Urge
44. High regard
46. Toboggan
47. An ancient board game
50. Escapade
53. Hearing organs
54. Passenger vehicle
55. Move restlessly
60. 57 in Roman numerals
61. Voters
63. Mentally irregular (slang)
64. Man
65. Moon of Saturn
66. Glance over
67. Backside
68. Arguments
2. Pear-shaped instrument
3. Food thickener
4. Bristle
5. Journeys
6. Eastern Standard Time
7. Japanese radish
8. Opening words of a text
9. Exam
10. Extremely wicked
11. Not inner
12. Without company
13. Unit of luminous flux
24. Calypso offshoot
25. Not dull
26. Ale
27. Highest point
28. A 19th century political party
29. Wandering from the main path
31. A metric unit of weight
33. Put on clothes
34. Where a bird lives
36. Quiet time
37. Being
38. Marsh plant
43. Evil spirit
45. Artists' workstands
47. Mobile phones
48. Mayhem
49. Genus of heath
51. Eastern newt
52. Violent disturbances
54. Chancel
56. Trickle
57. Nurse shark
58. French for "State"
59. 10 10 10 10
62. C