The multitude of F's and S's in this puzzle reminded me of a lovely Strindberg and Helium video. If you can spare the time, I suggest spending 1:31 seconds watching it.
We can thank the amusing theme for the extra F's. The letter F is added to the front of common two-word phrases which are clued accordingly. So a "Scary landlord?" is FRIGHTFULOWNER and Anti-fuel extraction slogan? is FRACKANDRUIN. FRISKYBUISNESS (What Fancy Feast and Meow Mix compete in?) is entertaining, but my favorite is FRANKAMATEUR (One who freely admits not being any good?). Apt!
Perhaps it was the all-S answer (SSS) at 47A (Sound of 1-Across) - which sported a pair of its own in HISS - that got me started noticing the S's in the puzzle, and there are quite a few (HEISTS, SSGTS, ESSO). So, yeah, S and F. :)
Fortunately, there are enough other letters in the grid to support a number of FINE C/APs including "Classify, as blood" (TYPE), "Gung-ho" (AVID), "Imposed, as a tax" (LEVIED), and "Not in operation, as a Broadway theater" (DARK).
I noted a number of fun pairs in the puzzle: two foot parts (ARCH and SOLE - the latter of which could also pair with COD), GAS and ESSO, HALF and CALF, THELMA and UIES, and of course ANJOU. HAHA.