Possible Clues:

• The plan is to have the precious stone in layers
• Tag master with cunning plan
• Ploy - start game (anag)
• Plan for the layers of precious stone
• Start badly with faulty game plan
• Start out with a new game plan
• Trick by Meg removing layers first
• The plan is to make it precious in layers
• Scheme excellent pro's turned up
• Start game removing trick