Unpolished (6)
I believe the answer is:
coarse
'unpolished' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for coarse that I've seen before include "Rough, uncouth" , "Rough in texture or crude in manner" , "Large-grained or rough to the touch" , "Rough-hewn" , "Vulgar; not fine" .)