This puzzle is likely a bit harder than some of my others. I would rate it a 3 or 3.5 on a scale of 5. I will be posting "nudges" along the way so if you are having difficulty they may help!
Early Nudge 1: If EVER there was an informative Title, it is this one (Madhatter came up with it, thank you Josh!)
Early Nudge 2: Clue 76A is so oddly worded that it HAS to be important!
Early Nudge 3: Don't some of the clues seem to go on well after they could have made their point, or could have been clued WAY easier?
Thursday Nudge: In reference to Early Nudge 3, does it really matter where you were going when you got the provisions in 14A?
Friday Nudge: As a follow up to the Thursday Nudge, why would I specifically name Marie Kondo (71A) unless I am trying to indicate something important?
Saturday Nudge: The theme answers are symmetrically placed
Sunday Nudge 1: The Meta answer is 8 letters long
Sunday Nudge 2: After you get all 7 of the theme answers, do what you've been doing one more time
If you have given up, here is the solution to the puzzle:
14A DELIS + A = SAILED (S)
18A REPEL + A = LEAPER (L)
23A TENOR + A = ORNATE (O)
42A SERED + A = ERASED (E)
54A SERGE + A = GREASE (G)
67A VINED + A = INVADE (I)
71A ENTER + A = NEATER (N)
SLOEGIN + A = GASOLINE
META ANSWER = GASOLINE