Fellow, in addition takes in first endurance race and is vocal we hear (8)
I believe the answer is:
falsetto
'is vocal we hear' is the definition.
I can't judge whether this defines the answer.
'fellow in addition takes in first endurance race' is the wordplay.
'fellow' becomes 'f' (abbreviation - of a society etc.).
'in addition' becomes 'also' (synonyms).
'takes in' means one lot of letters goes inside another.
'first' indicates taking the first letters.
'race' becomes 'tt'.
The initial letter of 'endurance' is 'e'.
'e'+'tt'='ett'
'also' enclosing 'ett' is 'alsetto'.
'f'+'alsetto'='FALSETTO'
'and' acts as a link.
Can you help me to learn more?
(Other definitions for falsetto that I've seen before include "Artificially high singing voice" , "Unnaturally high voice" , "Artificial pitch" , "high notes?" , "Unnatural voice" .)