Related Clues:

• It's said to be good at parting for 22 down
• That sounds like a good buy, deserving gratitude at the double
• "See ya, Sophia"
• Such extra may come at the double on parting
• Fare well with such an extra double
• "Ta-ta" in Turin
• Farewell, in 55 Down
• "Later, dahling!"
• "Sayonara!"
• It renders a seed inactive
• Venetian valediction
• Conversation stopper
• Doubly thankful to hear this as one leaves?
• Exit line
• 'g2g' follower