Aladdin's treasure (4)
I believe the answer is:
lamp
'aladdin's treasure' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for lamp that I've seen before include "punch" , "Appliance producing light" , "Lighting device in palm" , "Artificial source of illumination" , "Source of light, usually portable" .)