Really enjoyable puzzle, which, as a still fairly inexperienced solver, I found quite challenging in a couple of ways.
An initial incorrect entry for 29d delayed completion of the last part of the theme. The final correct entry was my third different attempt.
I also struggled with/misread the preamble (my inexperience, not the setters fault!) and as a result was fixated on a two letter word in the top row which is a named example of the kind of item to be blocked out, and not the correct item itself, which I found a bit later.
Thanks Sage. I got there in the end after a few struggles, very much enjoyed the process, learned a bit more about solving these infernal things, and love the look of the finished grid.