Abrasive material (9)
I believe the answer is:
sandpaper
'abrasive material' is the definition.
(sandpaper is a kind of abrasive material)
This is all the clue.
(Other definitions for sandpaper that I've seen before include "Abrasive smoother" , "Woodworker's abrasive" , "Abrasive material" , "Means of smoothing wood" , "Abrasive sheet (DIY)" .)