Rare inquisitor for me, but very much enjoyed it.
Three loose ends that I'd appreciate tidying up:
3d - I assume the unches are i and s but the definition seems a stretch and I can't see the wordplay?
19a - I have a 3 word phrase that is fully checked by crossers and fits the wordplay, but can't see how it means pipe down?
39a - can see the definition, cant see the wordplay
Thanks