State Swiss banks neglected fraud crime (9)
I believe the answer is:
wisconsin
'state swiss banks' is the definition.
'wisconsin' can be an answer for 'state' (I've seen this before). I am unsure of the 'swiss banks' bit.
'neglected fraud crime' is the wordplay.
'neglected' becomes 'wis' (I am not sure about this - if you are sure you should believe this answer much more).
'fraud' becomes 'con' (con is a kind of fraud).
'crime' becomes 'sin'.
'wis'+'con'+'sin'='WISCONSIN'
Can you help me to learn more?
(Other definitions for wisconsin that I've seen before include "American state, capital Madison" , "Northern state" , "State of N. central US" , "US state, capital Madision" , "State of north central US" .)