Sprite of superiority (4)
I believe the answer is:
peri
'sprite' is the definition.
(thesaurus)
'of superiority' is the wordplay.
'of' indicates a hidden word.
'PERI' is hidden within 'superiority'.
(Other definitions for peri that I've seen before include "Beautiful fairy" , "Spirit of folklore" , "Old Persian fairy" , "Persian fairy or genie" , "Fairy (Pers. mythology)" .)