"The Tempest" spirit (5)
I believe the answer is:
ariel
'the tempest spirit' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ariel that I've seen before include "Prospero's spirit (Tempest)" , "Moon" , "fairy sign" , "Shakespearian spirit" , "Shakespearean role" .)