Maybe I'm just a little heady 'cause I'm coming off that cold, but I really enjoyed this one. Right from the get-go, I loved the irreverence of 1A: What quoth the raven? (CAW)(!), and then SPRY (4A: Moving well for one's age) is another great word, and soon enough, the whole puzzle was filled with candy! What's not to like? Of course, I didn't know PUSHIT (9A: 1988 Salt-N-Pepa hit). All I know about Salt-N-Pepa is that Patrick Stewart introduced them when they were on Saturday Night Live, and I always say their name (when on those rare occasions it is required) in his voice, but really, I don't know any of their songs. Maybe they even sang "Push It" on that episode, and maybe I saw it, but did it sink in? No. But did that in any way diminish my appreciation of this puzzle? No.
The main difficulty for me was that I put "INStatE" in for INSPIRE (12D: Give rise to). I was thinking that "RTI" could have stood for the Rochester Institute of Technology (RIT), and I had frankly never heard of BORODIN (27A: "Prince Igor" composer)(another Halloween-y clue?), and that could have had an A in it... in short, I was confused, but "Not I" is not the answer to 31A: "Me neither" (NORI), so, eventually, things got fixed.
There were some fun clues in here. 33A: Breathtaking creatures? (BOAS), 59D: Groovy music (LPS), and 58D: Say "I do" when you don't? (LIE). And 44D: Spare wear (GSTRING) was also nice (eh, Huygens?).
Overall, a very nice Wednesday.