Possible Clues:

• Act (in a specified way)
• 'Act like you're supposed to!'
• Watch your Ps and Qs recalling one of the Per?ns - almost a goddess of youth
• Sit quietly, perhaps
• Keep one's nose clean
• What a welcome for Mary after start of birthday function
• Experience after live act
• Function for which Antipodean delivers apiary?
• It's a good thing to do to be able to get to possess this