All filled in (except one letter!)and understood the theme, but 1down: the obvious answer ends in T, is this right?
Sorry this is not much info but I didn't want to give too much away for people still doing this excellent crossword. Thanks in advance
Thanks Spoffy; I was aware that the fourth-named character was the one we were looking for to fill 1D, but I couldn't see (and still can't) how "St" is relevant.