Reading the clues in order, FOI was 22a, but it speeded up after that.
A couple of queries - and I may have the answers wrong:
5a parses perfectly, but why "refuse" (however stressed!)?
18a I see the first 4 letters, but can't parse the rest.
Very grateful for the 28a spoilers. I know many sweet wines but not being especially well read I had not heard of that one. A few other words I had to Google but all very solvable. 19 is above and beyond Pauline I would say. That's a post watershed word but a good clue all the same.