A voice raised in triumphal tones (4)
I believe the answer is:
alto
'a voice' is the definition.
(alto is a kind of voice)
'in triumphal tones' is the wordplay.
'in' indicates a hidden word.
'ALTO' is hidden within 'triumphal tones'.
'raised' is the link.
This may not be right. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for alto that I've seen before include "Highest male voice: lowest female voice" , "The highest adult male singing voice" , "One who sings" , "A singing voice or pitch" , "someone to sing" .)