Grating or rough (8)
I believe the answer is:
abrasive
This clue is a double definition.
'grating' is the first definition.
(I've seen this before)
'rough' is the second definition.
(similar in meaning)
(Other definitions for abrasive that I've seen before include "Overly aggressive" , "Pumice, for example" , "Harsh - chafing" , "Rough, grating" , "Wearing" .)