Preheat oven to 375°F. Prepare pie crust as directed on package for one-crust pie using 9-inch pie plate.
Mix granulated sugar, cornstarch, 1/2 teaspoon of the cinnamon and 1/8 teaspoon of the allspice in large bowl. Add pears and cranberries; toss to coat well. Spoon evenly into crust.
Mix flour, brown sugar, remaining 1/2 teaspoon cinnamon and 1/8 teaspoon allspice in small bowl. Cut in butter until coarse crumbs form. Sprinkle evenly over fruit in crust. Place pie on large baking sheet.
Bake 1 hour or until pears are tender and topping is lightly browned. Cool on wire rack.