As Frannie put it, this was "challenging, but not clever." Lots of arcana (RIB (22A: Neuralia : nerve :: costalgia : ____), SERO, EOSIN), proper names (ELIE, MAMET, RENEE, VALERIE, EERO, etc.), and "meh"-type stuff (DROIDRAZR, PFIZER, OXALIC, WIIMOTES).
Frannie did, however, enjoy EXCUSEYOU (15A: Comment to an unapologetic burper, say), which was our entree to the NW, and RRR (30A: School basics, facetiously). And 7D: Start of something big?" (ZYGOTE) wasn't bad. She also got SNEEZED (14D: Exhibited sternutation) from the French for "to sneeze," which is "éternuer." Not too shabby.
There's a nice Huygens crossing at DEIMOS (37A: Moon named after the Greek personification of terror) and GROPES (21D: Feels (for)), and I enjoyed CRAZE (27D: It's temporarily hot).
The highlight today is CECE (26A: Woman's name that sounds like a repeated letter). That's the name of a young crossword solver that we know! The runner up - AFB.