1: First zoo?

4: Tennis shot

7: Train for a title fight

11: Maître d's offering

13: Greets

15: Strongly advise

16: Hulks pump it

17: Weariness

18: Gravy server

19: They help some to come out of their shells

22: Winner at Caesar's palace?

23: Put in chains

24: V-8, e.g.

26: Squeeze (out)

27: Doo-wop selections

29: '___ appétit!'

32: Come after

34: Court TV feature

37: Course climax

39: Vague perception

41: 'Don't stop'

42: Greek sandwiches

44: Sour

46: Court divider

47: Small wave

49: Coke's partner, at the bar

51: Less fresh

53: Well-dressed dummy?

57: ___ for tat

58: Good judgment

61: Elec., e.g.

63: Al Yankovic's adjective

64: Narrow margin of victory

65: Slippery sheet

66: Loads a liner

67: Surface-to-surface missile

68: ___ off (repel)

69: Diddly-squat

70: Pivotal

1: Ammonia compound

2: Later showing

3: Seagoing speed units

4: Knight stick

5: Sty cry

6: Down in the dumps

7: Temp

8: Stipulation

9: 'Play It ___, Sam'

10: Fix loose laces

12: Title for Sam of government

13: Celestial sphere

14: Bred winners?

20: Autumn tool

21: Blue funk

25: Sanitizer's target

27: Gold dealer's unit

28: Add-on for Congo

29: Solicit alms

30: Kind of moron?

31: Telling of a story

33: Flippered fish fancier

35: 'You ___ here'

36: '___ me think about it'

38: Work hard

40: Gofers' tasks

43: What some writers work on

45: Place for a pat?

48: What predators do

50: Bearings

51: Fill with down

52: King or queen

53: Edible mushroom

54: Joke variety, when doubled

55: Magazine copy

56: Down on one's luck

59: Nasty

60: Dress design

62: Ran in front