Artificially high voice (8)
I believe the answer is:
falsetto
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">artificially high voice</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for falsetto that I've seen before include "Unusually high voice" , "Extra high male singing voice" , "Forcedly high voice" , "High-pitched voice above natural range" , "Unnatural voice" .)