Some superior supernatural being (4)
I believe the answer is:
peri
'supernatural being' is the definition.
(peri is a kind of supernatural being)
'some superior' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'PERI' is hidden in the letters of 'superior'.
(Other definitions for peri that I've seen before include "Beautiful fairy" , "Type of disembodied spirit or graceful young girl" , "Old Persian fairy" , "Malevolent Persian spirit" , "Fairy could be ripe" .)