Barbershop quartet member (5)
I believe the answer is:
tenor
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">barbershop quartet member</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 tenor that I've seen before include "Meaning - male singing voice" , "Carreras, for example" , "Male singer with high-pitched voice" , "Male singer with high register" , "Male singing voice of high pitch" .)