I have solved almost all of this but am still stuck on the final "otherwise unclued" words, and the very gentle hints from other posters here are too subtle for me - I cannot get anything out of "parsing" or "splitting" the magic word. Could somebody please prod me a bit harder.
In that case - the word means anonymous works, and is from the Greek "without master/s".
Bradford is so useful - one for your Christmas list perhaps, RossR!
Hi RossR - the way I got it was by looking in Bradfords under "anonymous", and finding a word that, with a bit of pruning, fitted into the unclued light to the far right of the grid.
If you split the thematic character 3-2, this may further help.
In that case - the word means anonymous works, and is from the Greek "without master/s".
Bradford is so useful - one for your Christmas list perhaps, RossR!