Broadcast idiocy mutates on The Young Ones for instance (9,6)
I believe the answer is:
situation comedy
'the young ones for instance' is the definition.
(The Young Ones is a sitcom)
'broadcast idiocy mutates on' is the wordplay.
'broadcast' indicates anagramming the letters (letters scattered or cast around).
'idiocy'+'mutates'+'on'='idiocymutateson'
'idiocymutateson' with letters rearranged gives 'SITUATION COMEDY'.
(Other definitions for situation comedy that I've seen before include "TV programme" , "Friends in this" , "TV series noted for its humour" , "Funny series on radio" , "Bottom perhaps" .)