Electronics whiz (6)
I believe the answer is:
techie
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">electronics whiz</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 techie that I've seen before include "computer expert" , "Expert in some practical science" , "PC expert" , "IT whizz" .)