1: Flippered fish fancier

5: Shipping dept. stamp

9: Tropical root

13: Plate of glass

14: Drive train element

15: Muscle

16: Flap

18: In base 8

19: President pro ___

20: Blossom from a bulb

21: Backpackers

22: Purify

24: Warning sounds

25: Fail to keep up

26: Cornea's companion

27: Parcels (out)

30: Like old bread

31: Check

34: Cut back

35: Certain food fishes

36: Summon with a beeper

37: Tint

38: Levelers in rivers

39: Fixed, as a shoe

40: Picks up

42: Tree fluid

43: Dover has them

44: Pick

47: Playground staples

48: Spruce cousins

49: Quoits target

51: Tough nut to crack

52: Kind of golf

54: Declares

55: Formerly

56: FYI cousin

57: Promontory

58: They're 16th of 26

59: Exemplar of rapid growth

1: Tiff

2: Itching (to)

3: Japanese cartooning style

4: '___ me think about it'

5: Nielsen number

6: Send to Siberia

7: Satiate

8: Remote room?

9: Pump in a trunk

10: Before birth

11: Brings up

12: Night birds

15: Evening affair

17: Wanted poster word

21: Land elevations

23: Head for the hills

24: Lots

26: Movie greats

27: Speed meas.

28: Vichy water

29: Vine supports

30: Leg parts

32: Historical period

33: Four-poster, e.g.

35: Feudal laborers

36: English poet Alexander

38: Vanilla cookies in banana pudding

39: Dance with a dip?

41: Down sources

42: Annual October event, with 'the'

43: Garlic bulb

44: As of

45: It can get you down

46: Flourless cake

47: Stretch across

48: Word with print or point

50: Be flexible

52: Swab

53: Fancy marble