Performer in part is tame (6)
I believe the answer is:
artist
'performer' is the definition.
(thesaurus)
'in part is tame' is the wordplay.
'in' indicates a hidden word.
'ARTIST' is hidden within 'part is tame'.
(Other definitions for artist that I've seen before include "Creative or skilful person" , "Constable, perhaps" , "One engaged in painting" , "eg Monet" , "Painter, drawer" .)