Ship's radio operator (6)
I believe the answer is:
sparks
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ship's radio operator</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 sparks that I've seen before include "Flashes from electrical discharge" , "Electrical discharges" , "They fly from fire" , "Fiery particles for informal electrician" , "Momentary flashes of light" .)