Last one really has me stumped: 19d: Introductory, other clue is: Small sum in progress written up first: e-e-i-g, I know it sounds daft but all I can come up with is EVENING, any help please.
I don't have the paper but wonder if your first letter is right? Opening seems to fit Introductory but can't see how it fits the cryptic clue. Sorry I can't be of any further help.