6. Dry riverbed

10. High-five, e.g.

14. Baggy

15. Memorable times

16. Aesop's also-ran

17. Assert one's right to

19. Mass number

20. Aquatic nymph

21. Per

23. Freight weight

24. Toll road

27. On dry land

29. Seller's add-on

33. Sign of spring

34. Circumvent

35. Heap

37. Moves erratically

40. Trifled (with)

41. Bake sale sponsor, perhaps

42. Seating request, e.g.

43. Did laps, say

44. Hurt badly

45. "South Pacific" nut

46. Apple variety

48. Passe Pathe short

50. Justification

52. Pluck

53. Possible buy from Vanna

54. Band booking

56. It rides 50D

60. Rustic retreats

62. Reprimand, in a way

66. Luxurious

67. African predator

68. South American rodent

69. Locale

70. Tolstoy heroine

71. Chaucer chapters

1. Addition, e.g.

2. Advance

3. Major Prado artist

4. Fungal spore sacs

5. Regressed, in a way

6. Early Chinese dynasty or river

7. Branch

8. Computer info

9. Cut off

10. "Be quiet!"

11. Ruin

12. Knight's "suit"

13. Pasta choice

18. Mine passage

22. Fire residue

25. Phi Beta ____

26. On the way out

28. Less clear

29. Collector's goal

30. Acknowledge

31. Abut

32. Plant swellings

36. Worse, as excuses go

38. Delight

39. Unload, as stock

42. Like some art

44. Strong paper used for envelopes

47. Account of sorts

49. Alongside

50. Used by 56A

51. Boredom

55. Acquire

57. Dwarf buffalo

58. Romantic interlude

59. Slangy denial

61. Reference to any ship

63. Poetic direction

64. Literary collection, e.g.

65. Greek N's