Propose a new adult programme (4,5)
I believe the answer is:
soap opera
'programme' is the definition.
(soap opera is a kind of programme)
'propose a new adult' is the wordplay.
'new' is an anagram indicator.
'adult' becomes 'a' (abbreviation).
'propose'+'a'='proposea'
'proposea' with letters rearranged gives 'soapoper'.
'soapoper'+'a'='SOAP-OPERA'
(Other definitions for soap opera that I've seen before include "Melodramatic TV serial" , "TV drama series" , "TV show" , "Eg, Coronation Street" , "Fair City or Coronation Street, say" .)