Possible Clues:

• Try a sure new method in the exchequer
• Note river in meandering estuary
• Try to get around a sure place of money
• The bank concerned with backing up America in venture
• River estuary redefined in thesaurus
• Government department in charge of finances
• Bank rate changed - excessive interest-taking denied us
• Place where great valuables are stored
• Government department's attempt to conceal a ruse that's failed
• Department with public funds