Fashionable tunes first, then balloon (7)
I believe the answer is:
airship
'balloon' is the definition.
(thesaurus)
'fashionable tunes first' is the wordplay.
'fashionable' becomes 'hip' (hip can mean trendy or fashionable).
'tunes' becomes 'airs' (air can mean a piece of music).
'first' is a charade indicator (letters next to each other).
'hip' put after 'airs' is 'AIRSHIP'.
'then' is the link.
(Other definitions for airship that I've seen before include "Means of transport" , "Flying machine" , "Lighter-than-air craft" , "Old flier" , "Gas-filled craft" .)