Fairy required - some experience necessary (4)
I believe the answer is:
peri
'fairy' is the definition.
(Persian mythological being)
'some experience necessary' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'PERI' is hidden within 'experience necessary'.
'required' acts as a link.
(Other definitions for peri that I've seen before include "A vision of loveliness" , "Persian fairy or genie" , "Fairy of Persian folklore" , "Beautiful fairy-like creature" , "Fairy (Pers. mythology)" .)