Voice raised loudly leads to another long row (8)
I believe the answer is:
falsetto
'voice raised' is the definition.
(I've seen this before)
'loudly leads to another long row' is the wordplay.
'loudly' becomes 'f' (short for forte - 'loud' in music).
'leads to' indicates taking the first letters.
'row' becomes 'setto' (I've seen this in another clue).
The first letters of 'another long' is 'al'.
'f'+'al'+'setto'='FALSETTO'
(Other definitions for falsetto that I've seen before include "High-pitched voice above natural range" , "it sounds high" , "Artificially high voice above the natural range" , "Artificially high voice pitch" , "A forced high singing voice" .)