Related Clues:

• "___ Joey" (Sinatra film)
• Pen ___ (letter-writing friend)
• Jekyll, vis-à-vis Hyde
• 19-Down, for one
• Paisano
• Intimate confidante
• Cold war term of address
• Homey, e.g.
• One close
• Former address of the Kremlin
• Confidante
• Ground bait
• Rodgers & Hart's "--- Joey"
• An informal friend
• Mate, informal friend