1. Loafer, e.g.
2. Extol
3. Type of sax
4. Bovine plaint?
5. Carl Sagan PBS series
6. Group that might support 29A
7. Fixes, in a way
8. Fifth note of a musical scale (var.)
9. Break in the action?
10. "That's A-1, dude!"
11. Platter player
12. Get what one deserves?
13. Thrash
18. Lions & tigers & bears
23. Be inquisitive
24. "That's A-1, dude!"
25. Ecological community
26. Lions' prey, possibly
27. Brits' floor coverings
28. Provide, as with a quality
29. Aplomb
30. Brownish gray
31. Flight segment
33. Pond dwellers
35. Aims
37. Ancient Jewish sect member
41. Preparation made by 10A
43. Alt. spelling
44. Lion, for one
46. Nobel, e.g.
47. Fret
48. Cunning
49. Can, in a way
50. Advance, slangily
51. Period of time
52. Parade honoree, perhaps
53. Celtic land
56. Bull markets
57. Dos Passos trilogy