Possible Clues:

• Nimble dancer finally introduced to agent
• Lively odds everybody misses rally
• Nimble son to act as snooper
• Moving quickly and energetically
• Active and lively, nimble
• Active for one's age
• Deft
• Lively (especially of an older person)
• Be nosy after the South gets full of 21-down
• Vigorously active