Choral piece leads to choir acknowledging new cheers (7)
I believe the answer is:
cantata
'choral piece' is the definition.
(I've seen this in another clue)
'leads to choir acknowledging new cheers' is the wordplay.
'leads to' suggests taking the first letters.
'cheers' becomes 'tata' (both can mean goodbye).
The first letters of 'choir acknowledging new' is 'can'.
'can'+'tata'='CANTATA'
(Other definitions for cantata that I've seen before include "Short oratorio performed in concert" , "Musical composition with religious text" , "musical form?" , "Vocal work with orchestra" , "Vocal setting of a text (often religious)" .)