Bank's hypocrisy (4)
I believe the answer is:
cant
I believe this is a double definition.
'bank's' is the first definition.
('cant' can be a synonym of 'bank')
'hypocrisy' is the second definition.
(I've seen this before)
(Other definitions for cant that I've seen before include "'Language of a group, Travellers say (4)'" , "Hypocritical or insincere talk" , "Not able to" , "Stock phrases made nonsensical by endless repetition" , "Hypocritical talk sounds unable" .)