Vulgar 'bleep' in a broadcast (8)
I believe the answer is:
plebeian
'vulgar' is the definition.
('plebeian' can be a synonym of 'vulgar')
'bleep in a broadcast' is the wordplay.
'broadcast' indicates anagramming the letters.
'bleep'+'in'+'a'='bleepina'
'bleepina' with letters rearranged gives 'PLEBEIAN'.
(Other definitions for plebeian that I've seen before include "Of Roman commoners" , "Of the common people" , "Lacking in refinement" , "Of the lower social classes, as in ancient Rome" , "(Roman) commoner" .)