State in which banks are corrupted (8)
I believe the answer is:
nebraska
'state' is the definition.
(Nebraska is an example)
'banks are corrupted' is the wordplay.
'corrupted' is an anagram indicator.
'banks'+'are'='banksare'
'banksare' with letters rearranged gives 'NEBRASKA'.
'in which' is the link.
(Other definitions for nebraska that I've seen before include "Mid-western US state" , "American state, capital Lincoln" , "US Midwest state" , "State N. of Kansas" , "State of central USA" .)