Hi Roof,
Yes, yes and yes to your first set of questions.
23a for mark think grammatically and 19 is not a cross reference to another clue, 19 is less than…
3d ‘a little’ gives one letter, then literally what do judges wear
Many thanks. One of my favourite authors. I saw it on television. It does mean I've got the wrong answer for 22d which might help me with 23ac. I had an "i" at the end, which didn't give me any words.
I did have a break early on to take the leaves off my hellebores as the flowers come through.