I came late to this (life will get in the way of crossword solving!) I have the theme an almost full grid - just one cell to fill in 10d and I have the 5 thematic entries. But having made the thematic entry for 21a I can’t find a real word to enter in 10d (and I can’t parse that clue anyway). Without the thematic entry in 21a I can see that there would be a real word entry for 10d, assuming that the last word is the definition but then 21a would be mince. Any advice much appreciated!