Related Clues:

• Double curve shape
• Show starter?
• Persona -- grata
• Ar follower
• Beginning or end of "Spartacus"
• Ar-tee connector
• Ending for heir or steward
• Security Council veto
• Superman logo
• Tricky turn
• Two-way curve
• 20-Across path
• Part of MST
• Double-180 maneuver
• Alternative to smoking