Roll pie dough* out on a lightly floured countertop, regularly checking to make sure disk is not sticking to counter. Roll into a 12-inch round. Fit pastry into a 9-inch pie plate. Crimp or flute the edges as desired. An easy thing to do is to press the crust with the tines of a fork. Refrigerate.
Preheat oven to 400 degrees.
Peel, core and slice apples crosswise into ¼-inch slices. Transfer to a large bowl and mix with soaked dried cherries, cherry preserves, lemon juice, sugar, flour, cinnamon, nutmeg and salt. Combine well. Arrange apple mixture in pie shell and dot with butter.
Make the walnut crumble: stir together the walnuts, flour, brown sugar, cinnamon, salt and butter in a medium bowl. Top the pie with small handfuls of the crumble, covering everything evenly.
Place pie on a baking sheet and bake for 30 minutes. Reduce oven temperature to 350 degrees. Continue baking until the crumble is golden and the juices are bubbling around the edges and have thickened, about 50 minutes more. Transfer to a cooling rack and cool for an hour before serving. Pie can be kept at room temperature for up to 2 days.