Singer's tone (5)
I believe the answer is:
tenor
I believe this is a double definition.
'singer's' is the first definition.
(tenor is a kind of singer)
'tone' is the second definition.
(synonyms)
(Other definitions for tenor that I've seen before include "Singer; drift" , "Male singing voice of high pitch" , "General drift or meaning" , "Highest male voice" , "General meaning of an utterance" .)