Sorry, I am a latecomer to this party but looking forward to gatecrashing! I forgot it and only downloaded this morning and have spent all day, on and off and on, wrangling with it.
I am not enjoying it (too many possibles to be sure of an answer), so much of it only pencilled in.
24d I have a food supplement but can't see a 9.
30a - haven't a clue.
Trevor, my parse on 23a is a 9 inside (pi)n on + possessive ending.