Lighting device (4)
I believe the answer is:
lamp
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lighting device</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for lamp that I've seen before include "bulb" , "Device providing illumination" , "Source of artificial light" , "Device for giving light on palm" , "Source of light, usually portable" .)