Nasal sound (5)
I believe the answer is:
twang
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">nasal 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 twang that I've seen before include "Pluck (a string)" , "A nasal intonation in speech, or sound of guitar" , "Distinctive nasal style of pronunciation" , "Nasal or musical sound" , "heard when listening to The Archers?" .)