Related Clues:

• Phone button
• Alpha, e.g.
• Wallet bill
• Canopus or Aldebaran
• See 28-Across
• Hamilton is on it
• Spinner
• 90 degrees
• Great ball of fire
• Prime time hour
• London's Big ___
• Whence the Magi, with 'the'
• Gymnast's goal
• Principal
• Leading