British audio broadcast features outwardly chic heroine (8)

'heroine' is the definition.
(I know that Boudicca is a folk hero)

'british audio broadcast features outwardly chic' is the wordplay.
'british' becomes 'b' (abbreviation e.g. in 'BBC').
'broadcast' indicates an anagram (letters scattered or cast around).
'features' means one lot of letters goes inside another.
'outwardly' means to remove the middle letters (only the outermost letters are used).
'chic' with its centre removed is 'cc'.
'audio' is an anagram of 'oudia'.
'oudia' placed around 'cc' is 'oudicca'.
'b'+'oudicca'='BOUDICCA'