Across

1. Ad-___ (improvises)

5. Acorn producer

8. Govt. branch

12. Twin brother of Jacob

13. King topper

14. Eternally

15. ___ Republic of Egypt

16. Take a shot at

17. Falafel bread

18. Former Davis Cup captain Arthur

20. Oregon's capital

21. Scorches

24. Mar. follower

25. Dunked snack

26. Certain marbles

29. Motel alternative

30. Female bighorn

31. Father

33. Big Bird's street

36. Photographer's request

38. Agua, in Arles

39. Eight-member ensemble

40. On the ocean

43. Send to the gallows

45. Kittens' cries

46. Charlie Parker's instrument

47. Let us know, on an invitation

51. Draft classification

52. Without exception

53. No longer in port

54. Was certain of

55. Little piggy

56. Lawn intruder

Down

1. Grazing area

2. Jerusalem's land: Abbr.

3. Sheep's sound

4. Outback maker

5. Vow

6. Farmland unit

7. Door opener

8. Go away

9. Satan's work

10. Tennis great Sampras

11. Mine vehicle

19. Grounded jet, for short

20. Place for losers?

21. Star Wars program, for short

22. Centuries of centuries

23. Frank or Francis

24. Get on in years

26. Reverence

27. Work on text

28. Closing act?

30. Flightless bird from Down Under

32. Investigator: Abbr.

34. Teeter-totter

35. Small battery size

36. Bush 43, to Bush 41

37. Country singer Tim

40. Run ___ (go wild)

41. Volunteer St.

42. ___' Pea (Popeye's boy)

43. Angel's topper

44. Car shaft

46. Was inactive

48. Wind dir.

49. Victory sign

50. Hippie's home

Solution on page 327