Possible Clues:

• Banderas of'Desperado'
• Pound of flesh promiser
• He's gone away, back to Italy, no doubt
• A notion about The Merchant of Venice
• Name of the Merchant of Venice who borrowed money
• A collection of books about one old merchant
• Mayor Villaraigosa
• 'I know you well enough; you are signior --' (Much Ado about Nothing)
• Banderas of "Pain and Glory"
• Merchant, one not taken aback in a negative response