Unrefined sort (4)
I believe the answer is:
boor
'unrefined sort' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for boor that I've seen before include "oaf" , "Lout" , "Rude uncouth person" , "Rough, bad-mannered person" , "Rude, uncultured type" .)