Possible Clues:

• One thing a bank can be
• One takes an interest in others' finances
• Usurer
• One advancing at interest
• He may take a great interest in providing finance
• Bread supplier
• Paper ___ (dispenser of fives and tens?)
• 17-Across's supplier when 28-Across runs low?
• The advances he makes are not without interest
• One who takes much interest in his work