Possible Clues:

• Lively odds and ends of on-air comedy
• Lively, perhaps for one's age
• Nimble, lively
• Like Granny on ''The Beverly Hillbillies''
• Quick, look right inside
• Nimble son to act as snooper
• Not at all lethargic
• Active and lively, nimble
• Not at all stiff
• Run into agent being active