Parking in it does upset bank (7)
I believe the answer is:
deposit
'bank' is the definition.
(I know that bank can be written as deposit)
'parking in it does upset' is the wordplay.
'parking' becomes 'p' (abbreviation on road signs).
'in' indicates putting letters inside.
'upset' is an anagram indicator.
'it'+'does'='itdoes'
'itdoes' anagrammed gives 'deosit'.
'p' placed within 'deosit' is 'DEPOSIT'.
(Other definitions for deposit that I've seen before include "Money given as security" , "Lay down" , "Returnable sum" , "Put down or leave something" , "Posited as down payment" .)