Lamp spirit? (5)
I believe the answer is:
genie
'lamp 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 "means of wishfulfilment" , "Magical being who carries out a person's wishes" , "In Arabian Nights, a magic goblin" , "Bottled spirit?" , "Helpful (?) spirit" .)