Possible Clues:

• Pinch together
• Pinch, as pie crust
• Pinch the edges of a piecrust
• Form tight curls in
• Pinch into small folds
• Pinch and press, as pie crust edges
• Press into small folds
• Pinch, as an empanada's edges
• Make waves when the Communist Party controls the margin
• Councillor and one politician wave