Possible Clues:

• -- for the money
• Signature piece?: Abbr.
• Pt. of an OK, maybe
• You're in trouble when you're here
• Letter of approval?: Abbr.
• Part of F.D.R.: Abbr.
• Gang of Four's 'Natural's Not ___'
• Entry blank datum: Abbr.
• Embroidered ltr.
• Brief O.K.: Abbr.