In a large bowl, combine flour and salt; cut in the shortening until crumbly. Gradually add water, tossing with a fork until dough forms a ball. Wrap in plastic wrap. Refrigerate for 1 to 1-1/2 hours or until easy to handle.
Preheat oven to 450°. Roll out pastry to fit a 9-in. pie plate. Transfer pastry to pie plate. Trim pastry to 1/2 in. beyond edge of plate; flute edges.
For filling, place apples in crust. Combine the sugar, flour and cinnamon; sprinkle over apples.
For topping, combine flour and sugar in a small bowl; cut in butter until crumbly. Sprinkle over filling. Bake 10 minutes. Reduce heat to 350°; bake 50-60 minutes or until topping is golden brown and filling is bubbly. Cool on a wire rack. Yield: 8 servings.