Across

1. "Please, I ___ of you"

4. What that too inevitably did

10. Defensive ditch

14. World's largest city in 1720

15. Seductive quality

16. Permanently mark

17. Kept secret

18. "Winamp, it really whips the ___ ass!"

19. Bandleader Puente

20. Answer from "The Adventure of the Blue Carbuncle", part 1

23. Science series beginning in 1974

24. Roz on Frasier, to Kelsey

25. Smaug and Puff

29. Activate a key

34. Subject of the sorites paradox

36. Case for needles

37. Answer, part 2

44. Verdi's "Celeste Aida", for example

45. Deliberately subjective newspiece

46. Nibs and wells?

50. One might be jailed or free

55. Major frustration (abbr)

57. Kissing target

58. Answer, part 3

64. DeVito vehicle

65. Climax

66. Opposite of 27-Down

67. Of the piehole

68. Like fingers in a fist

69. 37 Scottish inches

70. Nigeria produces most of the real ones

71. c and f/1.4

72. Tempeh source

Down

1. Tush

2. Notepad or Final Cut Pro

3. Lady who rode naked in protest

4. It might be read or green

5. Partner in war

6. Unit of stone

7. Recap

8. Like a palimpsest, perhaps

9. 1988 U2 song

10. Measure, as in punishment

11. Singer Redding

12. Random ___ of kindness

13. However, in textspeak

21. Hollywood union, briefly

22. Short drink

26. "I caught that!"

27. Opposite of 66-Across

28. Superstitious aphorism

30. Finally unemployed (abbr)

31. Ð in Old English

32. Author Grafton

33. Knight's address

35. Vietnamese soup

37. Activate a touchscreen

38. Resource in Catan

39. Blood relations

40. Day break

41. Loan metric (abbr)

42. One might be ice or sun

43. Singular

47. Every form of transportation has one, these days

48. Syringa bouquet

49. Take on additional responsibility

51. Cephalopod escape tool

52. Earliest boats

53. 1 was tragic but 11 historic

54. In a raunchy way

56. Treasure

58. Start to mount or sail?

59. Semester finale

60. Some might be vegetable or mineral

61. Gawk at

62. "I ___ To Know" (Marc Anthony song)

63. Turner and Cruz

64. Miniature