Thanks, all. Will try that other puzzle! Should say that I'm not here fishing for compliments, just genuinely interested in what people thought of the puzzle to try to do better next time. I did think it was going to be quite hard; puzzles with an extra letter in like this are usually a sod. If anyone's interested, it was actually pretty straightforward to set - once I'd had the idea, the grid came together in an hour and ten minute train ride from King's Cross to Cambridge, and the clues took another four or five hours.
Don't know if I'm allowed to say what else I do (if not, apologies, mods) - I also edit 1 Across (
http://www.1across.co.uk) and set custom puzzles (
http://www.customcrypticcrosswords.com) which are quite fun for birthdays and things. Not enough time now for Christmas, though!
Wonder if
this will come out in italics.