Scrape a beard off (6)
I believe the answer is:
abrade
'scrape' is the definition.
(synonyms)
'a beard off' is the wordplay.
'off' is an anagram indicator.
'beard' is an anagram of 'brade'.
'a'+'brade'='ABRADE'
(Other definitions for abrade that I've seen before include "Wear away by rubbing, scrape" , "Scrape away, erode" , "Wear away by rubbing (6)" , "Rub off or scrape away" , "Shave" .)