Gross or a score, maybe (6)
I believe the answer is:
coarse
'gross' is the definition.
(synonyms)
'a score maybe' is the wordplay.
'maybe' indicates an anagram.
'a'+'score'='ascore'
'ascore' with letters rearranged gives 'COARSE'.
'or' is the link.
(Other definitions for coarse that I've seen before include "Rough-hewn" , "Vulgar; not fine" , "Boorish" , "lacking in taste" , "Rude, base" .)