Poor farmer (7)
I believe the answer is:
peasant
'poor farmer' is the definition.
'peasant' can be an answer for 'farmer' (thesaurus). I also know that 'poor' relates to this answer.
This is the entire clue.
(Other definitions for peasant that I've seen before include "Farm worker - ignorant person" , "Member of rural underclass" , "Poor farmworker" , "Lowly tiller of land" , "Poor country worker" .)