Related Clues:

• The 13th item in a baker's dozen
• Bit part player
• When repeated, bygone newsboy's cry
• Home builder's afterthought
• More than usual
• Added on
• "Cast of thousands" member
• Expansion
• Newsdealer's shout of old
• Tribe member in many films
• Hollywood walk-on
• Garage, perhaps
• Run over
• Building wing, e.g.
• Extra, and this puzzle's title