Kind of a funny theme today of adding "ster" to one word in a common two-word expression, as in DRAGSTERQUEEN (44A: Female street-racing champion?), and FLASHMOBSTER (52A: Ostentatious member of the Mafia?). That last one would be better as "Flashy mobster," but there's no such phrase as "Flashy mob." And that's the drawback here - the answers ought to be funny, but the wacky cluing just doesn't quite work.
Aside from the theme, though, we have two nice long verticals - PARATROOPER (11D: High military figure?) (again, the clue just seems a little off) and RECORDLABEL (24D: RCA, for one). FOSCLE (6D: Ship part spelled with two apostrophes) is short for "forecastle," and Wikipedia actually has it abbreviated with three apostrophes, thus: fo'c's'le. SQUEEZE (43D: Tight hug) is good, as are CHASESCENE (17A: Standard feature of an action film) and OPENSEASON (58A: Prime hunting time) (isn't it not prime, but legal hunting time?), but having such long Across answers adjacent to theme answers seems a little odd.
1A: Fast-food chain known for its root beer (AANDW) gets a C. It was also my first confident answer.
I guess I didn't love this one. There's a lot of ELOI, ABEL, NYE, OPEC, IBET, TAU, AAH kind of stuff, as well as proper nouns like ESTES, ROCHE, STYNE, and EISNER. And can we count DOPEY (35D: One of a Disney septet) in there too? I really disliked 41A: ____ cent (PER), but I smiled at 53D: "Choosy ____ choose Jif" (ad slogan) (MOMS).
Not all bad, but not all good.