Mondrian wrote:-
.... As I have only been a regular on this site for a year, I hadn`t realised that you, Philip, and John from Arran had originated it.
The site is owned and was developed by Ash Young (see the Twitter link below right). PHILIP & JfA started the tradition (?) of a weekly dedicated RT thread with no answers only clues. Some like it and clearly (as Doug has demonstrated) some don't.
I found #6 quite easy but like everyone else was confused by the possible homophones for 3D. I've gone for the plasterboard solution but since I never send it in it doesn't really matter. However I will be writing to RT to complain about the ambiguous clue. Cue Doug!