The King departs after broadcast is dubbed (8)
I believe the answer is:
knighted
'is dubbed' is the definition.
(I've seen this before)
'the king departs after broadcast' is the wordplay.
'departs' becomes 'd' (abbreviation eg in train timetables).
'after' is a charade indicator (letters next to each other).
'broadcast' indicates an anagram (letters scattered or cast around).
'the'+'king'+'d'='thekingd'
'thekingd' anagrammed gives 'KNIGHTED'.
(Other definitions for knighted that I've seen before include "Given a title" , "Made a Sir" , "Given an honour" , "Dubbed 'Sir'" .)