Shows trendy balloon (7)
I believe the answer is:
airship
'balloon' is the definition.
(thesaurus)
'shows trendy' is the wordplay.
'shows' becomes 'airs' (shows on TV).
'trendy' becomes 'hip' (I've seen this in another clue).
'airs'+'hip'='AIRSHIP'
(Other definitions for airship that I've seen before include "need approval from CAA" , "Lighter-than-air craft" , "something hovering above?" , "Zeppelin, for example" , "Conveyance" .)