Creator's part is taxing to some extent (6)
I believe the answer is:
artist
'creator's' is the definition.
(artist is a kind of creator)
'part is taxing to some extent' is the wordplay.
'to some extent' says the answer is hidden in the clue.
'ARTIST' is hidden within 'part is taxing'.
(Other definitions for artist that I've seen before include "Model employer, perhaps" , "Painter, sculptor etc" , "Expert" , "Eg, a painter" , "Painter in dire strait" .)