Sci-fi weapon? (5)
I believe the answer is:
laser
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sci-fi weapon?</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for laser that I've seen before include "Intense light generator" , "Device producing a narrow, intense beam of light" , "scientific device" , "Device producing thin beam of light" , "Coherent light beam" .)