Audio effect (4)
I believe the answer is:
echo
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">audio effect</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 echo that I've seen before include "Nymph whose love Narcissus spurned" , "She loved Narcissus - it's recalled" , "A natural sound reflection" , "Reverberate - nymph spurned by Narcissus" , "Mimic" .)