Electronic sound reproduction (5)
I believe the answer is:
audio
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">electronic sound reproduction</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for audio that I've seen before include "Television sound" , "Sound broadcast" , "TV sound" , "Reproduction of recorded sound" , "in the sound department?" .)