Scuff, coarsen (7)
I believe the answer is:
roughen
(Other definitions for roughen that I've seen before include "rasp" , "Make (surface) uneven" , "Abrade" , "chap" , "Make less smooth" .)
I believe the answer is:
roughen
(Other definitions for roughen that I've seen before include "rasp" , "Make (surface) uneven" , "Abrade" , "chap" , "Make less smooth" .)