Magic spirit (5)
I believe the answer is:
genie
'magic spirit' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for genie that I've seen before include "Magical servant" , "Goblin as found in Aladdin's lamp" , "Obedient spirit of Arabian folklore" , "He came from Aladdin's lamp" , "Spirit in a bottle" .)