Beams of light (4)
I believe the answer is:
rays
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">beams of light</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 rays that I've seen before include "Flat fish" , "Single lines of light" , "Beams from sun or moon" , "Pencils of light" , "Sunbeams" .)