1. Mule's sire
2. "As if!"
3. African grazer
4. Kind of dog, e.g.
5. Recluse
6. A poser?
7. Noted bell ringer, e.g.
8. Ruler on Olympus
9. Half of nine?
10. Miserly type
11. Amazing, e.g.
12. Exiled Roman poet
13. Legendary loch
18. Friend of Lars & Sven, perhaps
21. New Year's Day game, namely
22. Goofy creator?
23. Carve
24. Amazing, e.g.
25. Adjust, in a way
26. Go on foot, with "it"
28. Kebabs needs
29. Weeds, so to speak
30. Rip off
31. Laid down the lawn, e.g.
33. Cobbler's concern
36. It's all wound up?
37. Gulf nation
39. Dab dry
40. Cutting crime?
42. String of beads, e.g.
43. By way of, briefly
45. Feed, as a fire
46. Caffeine's kick
47. Odds & ends
48. Anagram of "arts"
49. Italian blower & flower?
51. Can. province
52. John or Jane, e.g.
53. Hostel environment?
54. Capture, in a way
55. Cookie pusher org.