Wish-granting spirit (5)
I believe the answer is:
genie
'wish-granting spirit' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for genie that I've seen before include "Magical being who carries out a person's wishes" , "Magician residing in a lamp" , "Spirit with the power to grant wishes" , "Magic spirit" , "He came from Aladdin's lamp" .)