Charge recruiting tenor for fundraiser (4)
I believe the answer is:
fete
'fundraiser' is the definition.
(I have seen 'Outdoor fundraiser' mean 'fete' so perhaps 'fundraiser' could also mean 'fete')
'charge recruiting tenor' is the wordplay.
'charge' becomes 'fee' (fee is a kind of charge).
'recruiting' indicates putting letters inside (inserted letters are recruited into the word).
'tenor' becomes 't'.
'fee' enclosing 't' is 'FETE'.
'for' acts as a link.
(Other definitions for fete that I've seen before include "Entertain regally" , "Event held to raise money" , "Sale of goods and refreshments to raise funds for charity" , "Organised series of acts and performances" , "(Honour with) festivities" .)