1: PC software

5: Kiosk

10: Hgts.

14: Abrupt bit of thunder

15: Spine-tingling

16: Last of Great Britain's King Henrys

17: Christmas trio

18: Floors with a punch

19: Harbinger

20: Specs on a bridge

22: Investigator's assignment

23: Feed seed

24: Buckwheat noodles of Japan

26: Napoleon and Danish

31: Change for the better

35: In the past

36: Sorrow

38: Synagogue scroll

39: Major pain, slangily

41: Grammies

43: Ruing the run, perhaps

44: Juicy plants

46: Province of South Africa

48: Debussy's 'La ___'

49: Taste and smell

51: Strike a chord (with)

53: Quakers or Shakers

55: Take to court

56: Lewis Carroll's 'Jabberwocky' word for 'scratch, dog-style'

59: Kind, as to guests

65: Many millennia

66: Send to Siberia

67: Ripped off

68: Down in the dumps

69: Without

70: Roof rim

71: Kane's dying thought

72: Feeling expressed in many a Woody Allen film

73: St. and ave.

1: Very top

2: 'Hamlet,' for example

3: Summon with a beeper

4: Keg feature

5: What a patient may be under

6: Golf ball pegs

7: Circle sections

8: Personal preferences

9: Rent collector

10: Alligator pears

11: Peru's capital

12: Makes a sheepshank

13: Trig ratio

21: Piecrust ingredient

25: Wager

26: Mamas' mates

27: Quick-thinking

28: Ancient lawgiver

29: Sparkle

30: Navigational aid

32: Appetite stimulant

33: Editor's insertion symbol

34: 'Ta-da!'

37: Miles per hour, e.g.

40: Diminished

42: Most impudent

45: Attend

47: Galoot

50: Conceptual framework

52: Less messy

54: Poisonous substance

56: Shoots the breeze

57: Loud utterance

58: Bounder

60: Tell all

61: Favorable factor

62: Gravy server

63: All-conquering emotion

64: Barely manages, with 'out'