Related Clues:

• Hit with a deft comeback
• “Good one!” elicitor, perhaps
• 'Oh snap!'
• Zest — energy
• Vitality unknown in Grantchester at first
• 'Got 'em!'
• Vigorous quality
• Go free from Baltic?
• Very cold, losing free energy
• Lively energy (informal)
• Vitality (informal)
• "That was a clever comeback!"