Unpleasant sound (5)
I believe the answer is:
noise
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">unpleasant sound</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 noise that I've seen before include "Virgil's birthplace" , "Clatter" , "Unstructured sound" , "Loud sound; bruit" , "Excessive sound" .)