Rough wool fabric (5)
I believe the answer is:
tweed
'rough wool fabric' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tweed that I've seen before include "Woollen cloth - Scotland/England border river" , "Thick woolen fabric" , "Scottish and English river" , "Twilled cloth" , "Running water" .)