Possible Clues:

• Shut up, as poet might have said?
• How sterling I am! That ought to shut you up
• Sequester
• Hold, as a tower
• 'Yes, Ezra, we know -- shut up!'
• The setter's bash is appropriate
• Confiscate, appropriate
• One million quid put under lock and key
• Appropriate for poet to admit who he is
• Appropriate money, one million up front