1: Listened to the bears

5: Airhead

9: Morning rouser

14: Olympic weapon

15: Fluish feeling

16: Salk's conquest

17: Dennis the Menace's dog

18: Road grooves

19: Uses elbow grease

20: They fly higher than anyone

23: Leave in, to an editor

24: Sesame starter?

25: 'You ___ here'

27: Hazarding a guess: doctor who puts stomach muscles in pulleys?

34: Shoes with no heels

35: Harangue

36: Printer spec.

37: Write-off

38: Part of a bedroom set

40: Loafer inserts

41: 'Caught you!'

42: Gourmand's passion

43: Panaches

44: Hazarding a guess: doughy metaphysician?

48: Part of a journey

49: Skunk's funk

50: Roe source

53: Total cessation

59: Laptop instruments of yore

61: Strongly advise

62: Brainwave

63: Imitative

64: Charges for admission

65: 'Far out!'

66: Substantial

67: Like lemons

68: Kind of pool

1: Antitoxins

2: Important work

3: Where Barry Bonds plays, briefly

4: Does a freezer-related chore

5: One fixing holes, maybe

6: Creature in a Tennessee Williams title

7: Bishop Desmond

8: Relish

9: Liable

10: Untie

11: Got grounded?

12: Get all stirred up

13: Greatest amount

21: Goes for

22: John, Paul, or George, but not Ringo

26: Nonsense

27: Maui greeting

28: Like a primer

29: Doctrine of belief

30: Menlo Park monogram

31: Think tank output

32: Exhausted

33: Small birds

34: Brouhaha

38: iPod contents

39: Sensational

40: Batting eyelids, licking lips, etc.

42: Dr. No, to Bond

43: Qualities of the conceited

45: Like Bart, among the Simpson siblings

46: More drawn-out

47: Least typical

50: Loud door sound

51: Ballyhoo

52: 'Cessa di più resistere,' for one

54: Bunch of feathers

55: Bailiwick

56: ___ fixe

57: Show partiality

58: Not on schedule

60: Like a wallflower