Performer’s unusual traits (6)
I believe the answer is:
artist
'performer's' is the definition.
(eg a musician)
'unusual traits' is the wordplay.
'unusual' indicates anagramming the letters.
'traits' with letters rearranged gives 'ARTIST'.
(Other definitions for artist that I've seen before include "Strait (anag)" , "Skilful, imaginative, performer" , "Craftsman" , "Creator of aesthetic works" , "Bacon, for example?" .)