Related Clues:

• Con's cover
• On top of that
• Son of Sam, e.g.
• A criminal may go by it
• False name
• Hemingway's "The Sun --- Rises"
• Not only that
• 'Let's not forget ...'
• A spy might work under one
• Stage name
• Additional thought preceder
• Impostor's cover
• Nom de guerre
• A thief may go under one
• ''Not to mention ...''