Make coarse (7)
I believe the answer is:
roughen
(Other definitions for roughen that I've seen before include "Abrade" , "Gore Hun (anag)" , "rasp" , "chap" , "Make less smooth" .)
I believe the answer is:
roughen
(Other definitions for roughen that I've seen before include "Abrade" , "Gore Hun (anag)" , "rasp" , "chap" , "Make less smooth" .)