Thanks to the ever reliable Brockwell for another challenging but amusing Prize.
I seen to have found it much more difficult than you guys, but I think that's probably more down to me being out of sorts. For example, when I tell you that it took me 10 minutes to get 19a, you'll see what I mean!
COD; The outstanding 28a with 20a as runner-up.
The mini theme did make me wonder if Brockwell maybe had a case of the munchies when he composed this - I jest, of course;-)