Finished exhausted having broken the budget (9)
I believe the answer is:
overspent
'broken the budget' is the definition.
The answer and definition can be both to do with ownership as well as being past participle verbs.
Perhaps you can see an association between them that I don't see?
'finished exhausted' is the wordplay.
'finished' becomes 'over' (over can mean finished or ended).
'exhausted' becomes 'spent' (synonyms).
'over'+'spent'='OVERSPENT'
'having' is the link.
Can you help me to learn more?
(Other definitions for overspent that I've seen before include "exhausted" , "Invested too much" , "Used too much money" , "broke" , "financial crisis" .)