Fitting vocal work after hollow choral bilge (8)
I believe the answer is:
claptrap
'bilge' is the definition.
(both can mean nonsense)
'fitting vocal work after hollow choral' is the wordplay.
'fitting' becomes 'apt' (I've seen this before).
'vocal work' becomes 'rap' (rap is a type of vocal performance).
'after' means one lot of letters go next to another.
'hollow' says to hollow out the word (remove centre letters).
'choral' with its middle removed is 'cl'.
'apt'+'rap'='aptrap'
'aptrap' after 'cl' is 'CLAPTRAP'.
(Other definitions for claptrap that I've seen before include "Absurd or nonsensical talk or ideas" , "Pretentious talk used to win applause" , "Balderdash" , "Cobblers" , "Pretentious talk or nonsense" .)