Elegant society girl being broadcast (8)
I believe the answer is:
debonair
'elegant' is the definition.
(thesaurus)
'society girl being broadcast' is the wordplay.
'society girl' becomes 'deb' (I've seen this before).
'being broadcast' becomes 'onair' (I've seen this before).
'deb'+'onair'='DEBONAIR'
(Other definitions for debonair that I've seen before include "Elegant, sophisticated" , "(Of man) stylish, charming" , "Having a carefree confident manner" , "The dashing" , "Confident, stylish and charming" .)