This puzzle put itself at a disadvantage right away by starting with a clue that referred to another answer, but we came around to it in time. Loads of misdirection, as there often is on a Saturday, but do you ever feel like you can sometimes get into a groove by just starting with that as a premise? Take 50A: Key setting (OCEAN), for example. You see that clue on a Saturday and "lock" doesn't even enter your mind. Maybe that's a bad example, because "key" itself is almost crosswordese, and it's frequently given a tricky clue. Same thing for OBIS (34D: Geishas often draw them). You see the word "Geisha," and you immediately think "obi." How 'bout 57A: Universal work (MOVIE). Today, we saw the "hidden capital" for what it was, and put it in. I'm not really sure what I'm trying to say here, except that sometimes you're in the groove and sometimes you're not.
Perhaps the trickiest clue today for us was 61A: Evidence of having worn thongs (SANDALTAN). Frannie got that one, not because she wears thongs on the beach, but because she is more familiar with summer footwear terminology: "sandals;" "flip-flops;" "espadrilles;" "huaraches;" etc. Although honestly, she tells me now that she was using the aforementioned technique, and immediately went to places other than undergarments.
In the category of "tricky clues that kept us guessing for a while longer," you may add 10D: Fryer seen at a cookout? (BUGZAPPER) (very nice!) and 39D: Open love? (ZERO) (ditto). We didn't know RAMEAU (2D: Bach contemporary), STU (45A: Sportscaster Nahan with a star on the Hollywood Walk of Fame), or that PLAT meant an 31A: Area map (it can also be a verb!), but EMMASTONE (17A: "The Help" co-star, 2011) is always a pleasure, and AEGIS (15D: Backing) is a real nice word. Also kind of loved TADA (55D: Drumroll follower), so... decent Saturday.
p.s. We enjoyed remembering our old college friend "Skegger" when Frannie filled in SKEG (48A: Keel extension). Skegger, if you're out there, Hi!