puzzle

ACROSS

 1 Too clever by ___

 5 Creme de la creme

10 ___ gin fizz

14 Hip bones

15 Communist hero

16 Mansard, e.g.

17 Fall fast asleep

20 Redhead's secret, perhaps

21 "Good as gold" and "fresh as a daisy"

22 Environmental problem

25 Bright star

26 Feeling blue

29 One teaching econ, e.g.

31 Give, as an apology

35 Ascot, for one

36 Bacteria in uncooked food

38 1,000 to start?

39 What the glass ceiling is

43 Fourth of July sight

44 1945 meeting place for the Big Three

45 Auto fuel

46 Honoring, in a way

49 Man the bar

50 Food morsel

51 Layer cake section

53 It may cover a diamond

55 Mouseketeer toppers

58 Artist's prop

62 Take forever

65 Boxer's target

66 Reduce by 50 percent

67 Turkish honorific

68 Employed

69 Resin in adhesives and paints

70 Dog's bark

solution

DOWN

 1 Word with "dive" or "five"

 2 Shaving cream additive

 3 King of beasts

 4 Mythical forest-dwellers

 5 Letter that forms a right angle

 6 Flowery Hawaiian welcome 

 7 Invisible, indelible and India

 8 Promotional link

 9 Inspire with love

10 Land once known as Serendip

11 Theater seating area

12 Awed exhalations

13 The eastern newt

18 Fool around (with)

19 Viewed while happening

23 Huge 1977 film killer

24 Foolish or scatterbrained

26 Type of car, nurse or sergeant

27 Airline-seat locale

28 Skim, as milk

30 Parade component

32 Dog, Down Under

33 "Pomp and Circumstance" composer

34 Biddy's bed

37 Coastal feature

40 Not tranquil

41 Large European volcano

42 Military training groups

47 Singer Simone

48 Japanese serving girl

52 Pertaining to kidneys

54 Tree with oblong leaves and fruit

55 Heckler's chorus

56 Ill at ___ (uncomfortable)

57 Vaccine developer Jonas

59 Starch used in pudding

60 It's often tested with "Hello!"

61 Book sheet

62 Oxlike African antelope

63 Climbing plant

64 Escorted