Lantern (4)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
lamp
'lantern' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for lamp that I've seen before include "Lighting device in palm" , "Device for giving light on palm" , "Source of artificial light" , "This could be standard" , "Device providing illumination" .)