ACROSS

1. Copied

5. Star test-taker

9. Bow shaped structure

14. Classification term

15. Challenge

16. “I Love You ___ Much” popular children's book

17. Mid-east grp.

18. First name in 70's gymnastics

19. Burnt taste

20. Nutrient types

23. Native: Suffix

24. Amitryptyline, for ex.

25. In-flight info, for short

28. 1,000 kilograms, in London

31. ___ Club at Harvard

33. “The Alienist” author

34. SLE test

35. Prepares for war again

37. Uppity one

38. Grossly, pathologically

41. House lot, often

42. Lovely combining form

43. Totally

44. Emulated Pinocchio

45. Auto. parts, often

46. Run out, as a subscription

48. Begley and Asner

49. Asperger's dx, currently: abbr.

50. Attitude

51. Physical therapy type

57. Melee

60. Ambulance wkrs.

61. Aesop creature

62. Computer shortcut

63. Bareilles

64. Almond

65. Alarm

66. Mackerel

67. Workplace, for many

DOWN

1. Bit

2. Fiddler on the Roof singer

3. Board member, for short

4. Stent material

5. Building block

6. West coast site, to some

7. Therefore

8. Tries again

9. Old calculators

10. Rms. in homes

11. Vehicle

12. Illusionist Geller

13. Pink Floyd's Barrett

21. Maria ___, former undersecretary in the Obama administration

22. How one treats a sprain?

25. Cap attachment

26. Musical notes

27. Like some socks

28. Steamed Mexican staple

29. Taking LSD

30. Pearl layers

31. Holiness

32. Brief intro, as for a book

33. Bean counter, for short

36. Family to Felipe

39. Ruddy

40. Gut surface appendages

47. See 9 across

49. Bad lighting?

50. Syrian President

51. Depth

52. Apple purchase?

53. Other in Oneta

54. Dash

55. Sta. abbreviations

56. White: prefix

57. Gov't insurance manager

58. Bali ___

59. ORG. for the RHEUMATOLOGY community and clue to all the gray squares in the puzzle