High voice (8)
I believe the answer is:
falsetto
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">high voice</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for falsetto that I've seen before include "Extra high male singing voice" , "Unusually pitched" , "Unnaturally high-pitched voice" , "Artificially high voice tone" , "Strained sentiment" .)