Cast or cast out (6)
I believe the answer is:
actors
'cast' is the definition.
(I've seen this before)
'or cast out' is the wordplay.
'out' is an anagram indicator (out can mean wrong or inaccurate).
'or'+'cast'='orcast'
'orcast' with letters rearranged gives 'ACTORS'.
(Other definitions for actors that I've seen before include "Cast" , "The Gleeson boys, say" , "They 23 down" , "Theatrical performers" , "Luvvies" .)