1. Anagram for some short laughs
2. Bruce or Brenda
3. Pilot's info.
4. Moo chew?
5. Areas of interest
6. Committee, e.g.
7. Pendulum paths
8. U.S. medical research agcy.
9. Chinese "way"
10. On leave, perhaps
11. Taskmaster
12. Flexible
13. Impudence
18. So-so
21. What 15A is
22. Key for Bogart & Bacall
23. Cuisine category
24. Higher-ups, e.g.
25. These wings don't flap?
26. Enjoyed the casino, e.g.
27. Feudal estate
29. Peter, Paul or Mary
31. Kind of board
33. Oreo center
34. Listening, with "in"
36. Canadian native
37. Cork's country
39. Josip Broz, familiarly
40. They're nuts, e.g.
42. Elevates
43. Alliance
44. Invisible vibes, i.e.
45. About 1% of the atmosphere
46. Lockup, so to speak
47. Commend
49. Old Roman greeting
50. Place for your flowers, e.g.
51. Shogun capital
52. Mischievous one
53. Homonym for a Spanish "yes"
54. Make a mess, in a way