Rude sign interrupts rude bankrupt (9)
I believe the answer is:
insolvent
'bankrupt' is the definition.
(I know that bankrupt can be written as insolvent)
'rude sign interrupts rude' is the wordplay.
'rude sign' becomes 'v' (V-sign is two fingers).
'interrupts' is an insertion indicator.
'rude' becomes 'insolent' (I've seen this before).
'v' put into 'insolent' is 'INSOLVENT'.
(Other definitions for insolvent that I've seen before include "deep in debt?" , "Unable to pay debts owed" , "In the red" , "unable to raise the wind" , "Broke" .)