Grating, rough (8)
I believe the answer is:
abrasive
I believe this 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 "Harsh or insensitive in manner" , "One that wears" , "Like pumice - rough in manner" , "Rough, irritating" , "Pumice, for example" .)