1: Job for a grease monkey

5: Diving bird

9: 'Silent' prez, familiarly

12: Hulks pump it

13: Stored on board

15: Ankles, anatomically

16: Intrusive

18: Boulevard liners

19: Cargo compartment

20: Kaput

21: Adjective on some yogurt containers

23: Holiday nights

24: Heckle or Jeckle

25: More nimble

28: Under-the-tree items

32: Drain problem

33: Fruit cocktail fruit

34: One way to travel

35: Hurried activity

36: Yards of grass

37: Peru's capital

38: Fail to include

39: Overwhelmed

40: Where cookies might crumble

41: Open to dispute

43: Most furtive

45: Qualities of the conceited

46: Woodland deity

47: Lunar feature

50: They might be visual

51: Minor player, so to speak

54: 'Hey, that hurts!'

55: Desk

58: Microbrewery offerings

59: Ancient inscriptions

60: Summon with a beeper

61: Ran in front

62: Gold medal-winning

63: Stocking stuffers

1: Tree branch

2: Ammonia compound

3: Main mass

4: Wrap up

5: Ingenious

6: Desert refuges

7: Skunk's funk

8: President pro ___

9: A little lower?

10: ___ mater

11: Grocery shopper's reference

14: Suspects, usually

15: Meat cut

17: All-conquering emotion

22: Surgery sites, briefly

23: Big birthdays

24: Rancher's mark

25: Young codfish

26: Feather in one's cap

27: Bag contents on the mound

28: New World flycatcher

29: Like one who just fell off the turnip truck

30: X, mathwise

31: Bias, in reporting

33: Ratchet-wheel gizmos

36: Hard-hat

42: Historical period

43: Simon Legree

44: Lascivious longing

46: Things to put out

47: Brat's stocking stuffer

48: Have the final say

49: Sailed right through

50: Clearasil target

51: 'I'm history!'

52: Bacchanalian blast

53: Turns to the right

56: Temp

57: Choose