August Miller

 Title: Take a left and go north

I get to introduce another first time LAT constructor. I also could not find any other publications for this August August, so welcome. The theme has a visual curveball, so let us get right to it. 

I would have been stumped but for my problem with milk. When 20 A took me to the doorstep of Lactose Intolerant but had no room for the "ant," I had two thoughts. 1. There was going to be a picnic theme with"ants" missing from all of the themers. 2. It was visual and the "ant" was going to crawl up the puzzle. Neither was correct, but I did grok that the end of the fill just went up. The circles made that choice obvious. A fun idea that created much room for sparkly fill. 

MINOR IN, SUMMONS, GOES BOOM, OPERA HAT,  ABECEDARY, IN THE AREA, IRS AGENTS  and SKATEPUNK

Across:

1. Key __: remote-start devices: FOBS.

5. Not straight, in a way: GAY.

8. Haggard of country: MERLE.

13. "Yeah, yeah, I get it": OKOK.

14. People: ONES.

16. Lock up the victory: ICEIT.

17. They have taxing jobs: IRSAGENTS.

19. "Interstellar" co-writer/director Christopher: NOLAN.

20. Deficient in a certain enzyme: LACTOSEINTOLERA.

22. Recede: EBB.

23. Court orders: WRITS.

24. Brit's "Don't get upset, now": KEEPYOURHAI.

30. Org. fighting for refugees: ACLU.

31. Columbus' home: OHIO.

32. Some traffic monitors: NARCS.

37. Word after greater or lesser: THAN.

38. Very many, informally: MUCHO.

40. Situation, metaphorically: BOAT.

41. Passes (out): ZONKS.

43. Take another tour: REUP.

44. "Enchanted" girl in a 2004 film: ELLA.

45. Hand-to-hand battle: UNARMEDCOMB.

48. Streaks: ZOOMS.

51. Dwell on, maybe: RUE.

52. Lone survivor ... and a hint to the puzzle's circles?: LAST MAN STANDING.

59. State with a panhandle: IDAHO.

60. Nearby: IN THE AREA.

61. Compare: LIKEN.

62. Georgetown cager: HOYA.

63. __ Malek, Best Actor winner for "Bohemian Rhapsody": RAMI.

64. Neptune's are about 165 times longer than ours: YEARS.

65. Sandwich with a bit of crunch: BLT.

66. 2010 Ringo Starr album: YNOT.

Down:

1. The creature, to Dr. Frankenstein: FOIL.

2. Cajun food staple: OKRA.

3. Pear variety: BOSC.

4. Rock subgenre whose music is featured in "Tony Hawk's" games: SKATE PUNK.

5. Blows up: GOESBOOM.

6. Actress Hathaway: ANNE.

7. Himalayan with a thick coat: YETI.

8. Study on the side: MINORIN.

9. Food recall reason: ECOLI.

10. Subleased: RELET.

11. Yarn weavers: LIARS.

12. It's south of Vesuvius: ETNA.

15. Fig. on a return: SSN.

18. Pass: GOBY.

21. Defunct airline: TWA.

24. Apt surname for a vet: KATZ.

25. __ chamber: ECHO.

26. Panache: ELAN.

27. "Star Trek" linguistics expert: UHURA.

28. Kitchen gadget: RICER.

29. Just meh: HOHUM.

33. School primer: ABECEDARY.

34. Candy with a gooey center: ROLO.

35. Still, as a day: CALM.

36. Whack: STAB.

39. Collapsible headwear: OPERAHAT.

42. It's usually bad to be served with one: SUMMONS.

46. Hush-hush org.: NSA.

47. Sci-fi classic set on an arid world: DUNE.

48. "White Teeth" novelist Smith: ZADIE.

49. Japan's second-largest city: OSAKA.

50. Catch-all survey option: OTHER.

52. __ of the valley: LILY.

53. Medical research agcy.: NIH.

54. Stuck-up sort: SNOB.

55. Texter's sign-off: TTYL.

56. Caspian Sea land: IRAN.

57. Film fish to find: NEMO.

58. Way of walking: GAIT.