1: Swagger

6: Chart shape

9: Tip, as a fedora

13: Like a challenging cross-country course

14: Coat of many colors?

15: Durable fiber

16: Cattle breed

17: Sis or bro

18: Tornado siren, e.g.

19: Grapevine info, for example

21: Playmaking group

23: Helios, to the Romans

24: Nincompoop

25: Tongues do it

28: English poet Alexander

30: Meal

35: Word heard on December 31

37: Slips

39: Where Old Man River makes his deposits

40: Herr's helpmate

41: Letter flourish

43: Words by Wordsworth

44: Mountain pools

46: ___ tax

47: Pump part

48: Chilling downpours

50: Word in seven Hope titles

52: Supplied

53: Ditties

55: Debussy's 'La ___'

57: Soup eater's square

61: Fails to support

65: Sing like Bing

66: Vote to kill

68: Maui greeting

69: Matter makers

70: Spot

71: Spikes

72: Memory morsel

73: Tie the knot

74: Kiddies

1: Former Iranian ruler

2: Beverage with a bouquet

3: Pond organism

4: Epithets

5: Herb in the mint family

6: Floral arrangement

7: Sundial figure

8: Plumber's fitting

9: Either of the racing Earnhardts

10: Harbinger

11: Spruce cousins

12: Lavish party

15: Braved the rapids

20: Juicy plants

22: Cone producer

24: Frights

25: Moves lightly on the wind

26: Ear-related

27: Dirty look

29: Warm up, for short

31: Enlivens (with 'up')

32: Snobbishly unfriendly

33: Inscribed pillar

34: Brought under control

36: 50-Down feature

38: Farm tower

42: Olympic symbol

45: Soiled spots

49: Confession topic

51: Make potable

54: Decide to look at more issues

56: Race with batons

57: Sign of healing

58: Pretentious

59: Rioter's illegal take

60: Heavy book

61: Not the original color

62: Geology subject

63: Quaker's address

64: Back talk

67: Bluto's assent