Frame horse by a male illustrator (7)
I believe the answer is:
rackham
'illustrator' is the definition.
Both the definition and answer are singular nouns.
Perhaps you can see an association between them that I can't see?
'frame horse by a male' is the wordplay.
'frame' becomes 'rack' (rack is a kind of frame).
'horse by' becomes 'h' (abbreviation as in horse power. I am not sure about the 'by' bit.).
'male' becomes 'm' (common abbreviation).
'rack'+'h'+'a'+'m'='RACKHAM'
Can you help me to learn more?
(Other definitions for rackham that I've seen before include "Arthur ---, English illustrator" , "4 ---, fairy-tale illustrator" , "Arthur -, noted C-nineteen-twenty illustrator" .)