Lawyer opposing pieces local officials broadcast (6,7)
I believe the answer is:
queens counsel
'lawyer' is the definition.
(I know that Queens Counsel is a type of Counsel to the Crown)
'opposing pieces local officials broadcast' is the wordplay.
'opposing pieces' becomes 'queens' (chess pieces).
'local officials' becomes 'council' (local politicians).
'broadcast' shows a homophone (sound like) (how the word might sound on the radio or TV).
'council' is a homophone of 'counsel'.
'queens'+'counsel'='QUEENS COUNSEL'
(Another definition for queens counsel that I've seen is " Senior barrister, entitled to wear a silk gown".)