Cryptic crossword No 3,186

Hi Vanilla, this was a nice theme to work with. I’ll admit to finding it quite hard work overall, although I thought many clues were very good, including some I had to reveal, and some would have had my tick with small changes. My pick of the bunch (with brackets where I cheated): (12a), 28a, D 6d, 7d!, 13d, 14d, (21d), (23a), (29a). Many thanks. More thoughts below…