Theme: Where there's smoke... - The reveal word is split open and bookends the theme entries.
17A. *Motorist's headache : FLAT TIRE
23A. *Enjoy, with "in" : FIND PLEASURE
30A. *Recap on a sports crawl line : FINAL SCORE
42A. *Kids' introduction to a full school day : FIRST GRADE
46A. *Red-carpet movie event : FILM PREMIERE
60A. "Chestnuts roasting" spot ... and a hint to a divided word found in the answers to starred clues : OPEN FIRE
Argyle here. 1 F-IRE, 3 FI-RE, and 1 FIR-E. A clean looking grid. Easy-peasy but not condescending. A good fit for a Tuesday.
Across:
1. Succotash bean : LIMA. Fresh corn, lima beans and other shelled beans of your choosing.
5. Make a decision : OPT
8. Within reach : AT HAND
14. Tree of Life garden : EDEN
15. Like much sushi : RAW
16. Set of lines on personal stationery : HEADER
19. DNA sample source : SALIVA
20. Vietnamese New Year : TET. Tết Nguyên Đán
21. Dutch South African : BOER. (Dutch: “husbandman,” or “farmer”)
22. Censor's cover-up : [BLEEP!]
26. Counting everything : IN ALL
29. Part of DJIA: Abbr. : AVG. (Dow Jones Industrial Average)
34. Phi __ Kappa : BETA
38. Took wing : FLEW
39. Toward the back of the boat : AREAR
40. Physics class subject : ATOM
41. Evergreen shrubs : YEWS. Ireland's oldest tree, the Silken Thomas Yew, is 700–800 years old.
44. Religious sch. : SEM. (seminary)
45. Wrinkle-resistant synthetic : ORLON
53. TV studio sign : [ON AIR]
54. Either of two Henry VIII wives : ANNE. Anne Boleyn or Anne of Cleves.
55. Lacking light : DIM
58. Victimized lieutenant in "Othello" : CASSIO. Iago(bad guy) insinuates that Cassio(young stud) is having an affair with Othello's wife(untrue).
62. Election surprises : UPSETS
63. 1921 robot play : R.U.R. [Rossumovi Univerzální Roboti (Rossum's Universal Robots)]
64. Pennsylvania port : ERIE
65. Mall directory listings : STORES
66. "What was __ do?" : I TO
67. Lemon peel : ZEST
Down:
1. It's not right : LEFT
2. Just hanging around : IDLE
3. Vegan no-no : MEAT. 57D. Swimming event : MEET
4. Wee hill builder : ANT. The builder may be wee but the hill, not so much.
5. Hunter constellation : ORION
6. Peeled with a knife : PARED
7. Punk : TWERP
8. Massage responses : AHs
9. Lipton packet : TEA BAG
10. Concert auditoriums : HALLS
11. Bordeaux bye : ADIEU
12. Not even once : NEVER
13. Hang loosely, as on a clothesline : DRAPE
18. Govt. security : T-BILL
23. Character weaknesses : FLAWS
24. "__ Theme": "Doctor Zhivago" song : LARA'S
25. Three-time Wimbledon champ Chris : EVERT. Three-time married, now single, living in Florida.
26. Up in the air : IFFY
27. Aswan High Dam river : NILE
28. Once again : ANEW
31. Less dangerous : SAFER
32. Burglary, for one : CRIME
33. "The Star-Spangled Banner" contraction : O'ER
34. Ballerina's rail : BARRE
35. List-ending abbr. : ET AL.
36. __ list: chores : TO DO
37. "I'm with you!" : "AMEN!"
43. "The Elements of Bridge" author Charles : GOREN
44. 7UP rival : SPRITE
46. Sharpen the image in the viewfinder : FOCUS
47. Ill-suited : INAPT. Better than UNAPT, eh?
48. Rodeo rope : LASSO
49. Penny pincher : MISER
50. New Zealand native : MAORI
51. Data to be entered : INPUT
52. January, to José : ENERO. March, to José : MARZO
55. Desperate : DIRE
56. Commonly purple bloom : IRIS
59. '40s spy org. : OSS. (Office of Strategic Services)
61. Shriner's hat : FEZ
Argyle