Related Clues:

• Park, e.g., in N.Y.C
• Letters before an intended recipient's name
• Subj. line alert
• "Greetings, Brutus!"
• Many a Monopoly prop
• Routing aid: Abbr
• Routing abbr. on an envelope
• Many a state name in DC
• For whom the memo is intended: Abbr
• Letters before a name on a letter
• D.C.'s Pennsylvania
• Envelope ltrs
• Fifth, e.g.: Abbr
• Atlantic in Atlantic City, e.g.: Abbr
• Abbr. on a Monopoly board