I'm over 1/4 way through this but it's like wading through treacle and I don't know why, because when I get an answer it seems OK.
Not enjoying it, anyway - not enough 'aha!' moments for me.
I got the poet early on but can't see how he helps matters.
Is 21D/21U a herb? If it is, I'm wrong about 25A/25B: I thought the second part showed Picaroon to be a Geordie! And if it is a herb, I can't see why from the itty-bitty bits of the clue (what d'you call the bits that aren't the definition?).