i confess that i didn't notice the problem with 7d - i just wrote in the answer from the definition (as with several others!)
i don't think 21 is fair, despite now understanding the parsing. why should "leader must go" apply to the second word rather than the first?
i'm still not seeing the parsing in 10a - no exchange, or even ex change. is the obvious answer wrong?
favourite loi 24a - took ages to realise what 3/2 referred to!