Subject for a Millet painting (7)
I believe the answer is:
peasant
'subject for a millet painting' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for peasant that I've seen before include "Revolting person" , "Rural person of low class" , "Poor country worker" , "Poor worker on the land" , "One from the country" .)