Work introduced by house band (4)
I believe the answer is:
hoop
'band' is the definition.
(I know that hoop is a type of band)
'work introduced by house' is the wordplay.
'work' becomes 'op' (abbreviation for opus).
'introduced by' is a charade indicator (letters next to each other).
'house' becomes 'ho' (abbreviation for house).
'op' after 'ho' is 'HOOP'.
(Other definitions for hoop that I've seen before include "Rigid circular band" , "Circular band, in basketball, say" , "Arch used in croquet" , "Circular band; child's toy" , "Large ring" .)