Related Clues:

• Crackerjack
• Underworld figure
• Mr. Hyde, for one
• Big heart?
• One with perfect pitch?
• One
• Maven
• Breeze through
• The Red Baron was one
• Valuable diamond?
• Close friend, in slang
• Serve like Sampras, e.g.
• Adept
• First-class
• Superlative