Unsophisticated rustic (5)
I believe the answer is:
yokel
'unsophisticated rustic' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for yokel that I've seen before include "Country bumpkin" , "Simple rustic" , "Rustic person (derogatory)" , "rustic type" , "Hayseed" .)