1: Nasty

5: Tired adages

9: Malt liquor yeast

13: BB's and bullets

14: Contaminant-free

15: Worth

16: Proof of pmt.

17: Like the Atacama

18: Juicy plants

19: Revel

21: Iditarod entries

22: Furrow filler on a farm

23: Remove graphite or graffiti

25: Afternoon brew

27: Liberal ones

31: Neatnik's nemesis

35: Tango maneuver

37: Blunder

38: Personal preferences

40: Wharf pest

42: Insinuatingly spoken

43: Scared

45: Ancient mariner

47: Sailed right through

48: Coffeehouse poet, once

50: President pro ___

52: Fort Knox bar

54: Wrist bone

59: Cut companion

62: Blood vessel connected to a capillary

64: Acquire, as a debt

65: Spun yarns

66: Slippery sheet

67: Natterjacks, e.g.

68: Clearasil target

69: Long and lean

70: Players may up it

71: Tennis match divisions

72: Units of work

1: Chagall and Antony

2: Show host

3: More than sufficient

4: Picked up on

5: Engaged in repartee

6: Mystique

7: Correspond with

8: Matzo meals

9: She's often on her toes

10: Burn soother

11: Regretted

12: GI's diner

15: Feudal tenants

20: Wager

24: Starts of sneezes

26: Tune

28: Multigenerational story

29: Obnoxious

30: Stepped on it

31: Hunk of cheese

32: Limb's partner

33: Gumbo vegetable

34: Exalted happiness

36: Butter square

39: Sloths and gluttons, e.g.

41: Feline, to Tweety

44: Do some research

46: Ebbs

49: They climb up trees down under

51: Spoil

53: Brief instant

55: Biathlete's burden

56: Like extreme opposites

57: Together (with)

58: Welsh emblems

59: Sandwich bread

60: In the near future

61: 'Flee, feline!'

63: Camp sight