Entertainers needing a rest sit out (8)
I believe the answer is:
artistes
'entertainers' is the definition.
(artiste is a kind of entertainer)
'a rest sit out' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'rest'+'sit'='restsit'
'restsit' with letters rearranged gives 'rtistes'.
'a'+'rtistes'='ARTISTES'
'needing' is the link.
(Other definitions for artistes that I've seen before include "Professional entertainers, singers or dancers" , "Public performers" .)