Preheat oven to 325 degrees. Combine flour, brown sugar, oats and cinnamon. Gradually stir in butter until mixture is crumbly; set aside.
Roll pie crust in a circle with an 11-inch diameter, on lightly floured surface. Place the pie crust into a 9-inch pie plate and fold excess crust under at the edge of the pie plate. Press pie crust together along the rim to form a thick crust. Create a decorative edge by pressing down on the crust with fingers or tines of a fork, if desired.
Combine apples, cranberry sauce, brown sugar and cornstarch until well blended. Spoon apple mixture into pie crust. Sprinkle with Streusel mixture. Bake about 1 hour, or until apples are tender. Serve warm.