Thanks cockie and jbird54. I still can't see either so I'm wondering if I've gone wrong somewhere with the crossers. However, I'm confident about 11, 14 and 23 so maybe 2d doesn't start with the letter that I've assumed from the wordplay. For 1d, I have a word that isn't actually in Chambers but is a pretty obvious 'derivative' of a word that is. It satisfies the definition exactly but I can't see the wordplay at all so maybe it's wrong. I've spent hours on this so I think I'll sleep on it and try again tomorrow.