HI Chrise
I too am stuck in that bottom left hand corner. I'm afraid your hints haven't helped me. Is Queen the definition for 26ac. I thought it would be cheers. I may have just got this one.
I'm not sure what you mean by a coarse nothing for 17ac. Again I'm not sure of the definition.
I also could do with some help for 23ac. I think I have been put off by guessing an answer for 15d, which I now think must be wrong. I get the following crossers T?R? O?F ?V with my guess, but none of them help with the across clues.
I might come to it fresh in the morning.