Rowdy outside broadcast disrupted superstore (12)
I believe the answer is:
obstreperous
'rowdy' is the definition.
(thesaurus)
'outside broadcast disrupted superstore' is the wordplay.
'outside broadcast' becomes 'ob'.
'disrupted' indicates an anagram.
'superstore' with letters rearranged gives 'streperous'.
'ob'+'streperous'='OBSTREPEROUS'
(Other definitions for obstreperous that I've seen before include "Bolshie" , "Sober posture (anag) - unruly" , "Noisily aggressive" , "Noisy, hard to control" , "Noisily defiant" .)