12 across is one of the ten thematic answers, look up "fine gentleman" in chambers
19 down - remember many words can be abbreviated to a single letter - take this out of one word to get another
i think that will give you a start
just to keep you in the know as you seem to be new to this site - many avid listener fans get outraged when they see answers or partial answers e.g. (TIN?) posted on this site. we give nudges if required
a weekly link to the listener crossword on AB is here
So grateful, Midazolam, and I have taken on board the message about partial answers on this site. I had managed the short one I asked about, and come up with the fact that twelve across was thematic, but could not relate fine gentleman to either of the two possible words. I have completed it now and am really happy. Thanks again.