Maybe it’s the mood I’m in but beyond the satisfaction of building the answers, I didn’t find this one a particularly entertaining solve. The theme was of minimal help to me, despite getting 22a early doors. I have limited knowledge in that subject area, but gained a bit by looking up potential candidates from the across answers. I wonder if sticking so rigidly to the theme limited the setter’s creativity here.
I think the answer to 21d is referring to the first part a substitute for a meatloaf. This sort does exist it seems, but the nut one is better known - it was often mocked in the 1970s.
I still have 3d and 7d to go. Some help would be welcome please.
Hints in this forum have been very helpful as per usual thanks!