Radio travel broadcast is a promotional feature (11)
I believe the answer is:
advertorial
'a promotional feature' is the definition.
(editorial content which advertises something)
'radio travel broadcast' is the wordplay.
'broadcast' indicates anagramming the letters.
'radio'+'travel'='radiotravel'
'radiotravel' is an anagram of 'ADVERTORIAL'.
'is' acts as a link.
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