Bust rioting punk brat (8)
I believe the answer is:
bankrupt
'bust' is the definition.
(I've seen this before)
'rioting punk brat' is the wordplay.
'rioting' indicates an anagram (I've seen this in other clues).
'punk'+'brat'='punkbrat'
'punkbrat' is an anagram of 'BANKRUPT'.
(Other definitions for bankrupt that I've seen before include "Person legally declared to be unable to pay debts" , "Financially 'bust'" , "Having insufficient assets to cover debts" , "in Carey Street" , "Failed" .)