'Dad's Army' made rough broadcast (4,5)
I believe the answer is:
home guard
'dad's army' is the definition.
(I've seen this before)
'made rough broadcast' is the wordplay.
'broadcast' indicates an anagram.
'made'+'rough'='maderough'
'maderough' anagrammed gives 'HOME GUARD'.
(Other definitions for home guard that I've seen before include "security force" , "Last line of defence in World War II" , "World War Two defence organisation" , "Volunteer force" , "Dad's Army" .)