As hinted by the revealer, a solver could ADDTOCART the beginnings of today's four theme answers (TEAGARDEN, SHOPPINGLIST, GOLFTOURNAMENTS, and APPLESTRUDEL), which could, perhaps, more succinctly summarized as types of carts. :)
The non-theme fill runs the gamut from FIFI (Classic name for a poodle) to STAN Lee of Marvel Comics. The two long downs, CARPIPANTS and SOLARPANEL both nicely evoke warmer weather. As does OUZO, at least for me, because I first tasted it during a trip to Greece in my youth - my drinking-age-appropriate youth, naturally. I was amused by 7D. Acquire a winter coat? (ICEUP) and I enjoyed 67A. "Hold the ___" (deli order) (MAYO) because it reminded me of an excellent bit from the movie Airplane!, which, incidentally, as you probably all remember, included a nod to the movie "JAWS" (yesterday's puzzle theme) in the opening credits. But, my favorite clue/answer pair today was 54D. "Speed reader" (RADAR). Ha!
I liked the apt clue and answer pairs throughout this puzzle. My only PEEVE was MIFFS for "Rubs the wrong way," which ruffled my feathers a little.