The penny finally dropped! I think my only remaining confusion is 24ac—is this simply a cryptic definition? It feels unnecessarily verbose but I can’t see granular wordplay otherwise.
Got everything done, eventually, except 24d, Crack filter with one teabag stewed, stifling word of doubt (7) The letters I have can only be completed by one of 2 words, but I can't make either fit the clue, so any pointers would be very welcome