Did he also paint on the back of the canvas? (6)
I believe the answer is:
turner
This might be a double definition.
'did he also paint on' is the first definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'back of the canvas?' is the second definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
'the' is the link.
Can you help me to learn more?
(Other definitions for turner that I've seen before include "English painter - revolving item?" , "J. M. W. -, English eighteenth to nineteenth century painter" , "craftsperson" , "Artist - wheel?" , "Lathe operator and English landscape painter" .)