Got it, thanks Mattrom, thanks Thom - never considered initials for the writer!
On the highlighted word, I've looked at every definition in Chambers and none even come close to matching the deleted letters message - what am I missing?
For the record, I saw the word 2 lines directly above the correct one and didn't look any further. Oddly, Chambers doesn't give it as a theme word but I'm sure it's a slang term for it - isn't it?
Re 22d, if you have the extra letter, F, the parsing is 1,2,3, university, Greek letter, writer’s initials (Treasure Island). Displays is the definition. No more to it than that, surely?