1: Rapid transits?

6: Repetitive computer program

9: Wintry mess

14: Pass out

15: Fireman's tool

16: Like some keys

17: Party's candidates

18: Remote room?

19: Islamic chiefs

20: Experience a lack of oxygen, perhaps

23: Fade away

24: Sensational

25: Star pitcher

28: Thpeak like thith

31: Bee attractor

36: Toothpaste additives

39: Paycheck booster

40: Subordinate staffer

41: Bend a bit

43: Unused portion

44: Character assault

46: Seventh Commandment flouter

48: Crab type

50: Incite

51: Pig's digs

52: Constricting snake

54: Wild bunch

56: Befuddle

64: Regional flora and fauna

65: Point, as a rifle

66: Turned white

67: Put a new price on, say

68: Biathlon need

69: Nosed (out)

70: Saw

71: Go down

72: Poised for action

1: Impetuous

2: Friend

3: Brouhaha

4: Schlepped

5: Aseptic

6: Summoned

7: Whom the yoke's on?

8: Agent's take, maybe

9: Metal refinery

10: Peru's capital

11: Single thing

12: Ruing the run, perhaps

13: 9 - 5, e.g.

21: Rock groups?

22: Cyclotron bit

25: Flooded

26: Doorbell component

27: Kind of down

29: Words with precedent

30: Goads

32: Devil-may-___

33: They may be stacked

34: Balance sheet positive

35: Give it another shot

37: Sled dogs, as a group

38: Where to see the alphabet float

42: Weight that sounds like a fruit

45: Chest protector

47: Hard-working entertainer

49: Excessively

53: Accumulate

55: Cutter

56: Conked out

57: Greek letter

58: Kind of beetle

59: Tour de France vehicle

60: Fail to include

61: Pond organism

62: Miffed, with 'off'

63: Small whirlpool

64: Two-piece piece