Musical husband broadcasts on request (9)
I believe the answer is:
hairspray
'musical' is the definition.
(US musical)
'husband broadcasts on request' is the wordplay.
'husband' becomes 'h'.
'broadcasts' becomes 'airs' ('air' can be a synonym of 'broadcast').
'on' is a charade indicator (letters next to each other).
'request' becomes 'pray'.
'h'+'airs'+'pray'='HAIRSPRAY'
(Other definitions for hairspray that I've seen before include "setter" , "pressurised stuff?" , "Barnet manager" , "fine solution" .)