Barbershop quartet member (5)
I believe the answer is:
tenor
'barbershop quartet member' is the definition.
(I've seen this in another clue)
This is all the clue.
(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" .)