Does he work on notepaper? (8)
I believe the answer is:
composer
'does he work on notepaper?' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
This is all the clue.
Can you help me to learn more?
(Other definitions for composer that I've seen before include "Eg, Elgar" , "Eg, Arne, Bach, Chopin" , "A creator of music" , "Beethoven or Mozart, say" , "A maker of music" .)