Possible Clues:

• Deposit dispatched – small amount of money enclosed
• Advise dim entrepreneur holding deposit
• Dregs; deposit
• Ecstatic about bit of money that's settled matter
• Waters flowing back trapping chaps in grounds
• Deposit dispatched containing small coin
• Deposit posted containing bit of money
• Material settling out
• Waters flowing back -- chaps collected sludge
• Material settling out in a liquid