Combine sugar and cornstarch in saucepan.Add cherries and liqueur.Cook and stir over low heat until mixture thickens.Spoon into baked pie shell.Make topping:combine flour and sugar and cut in butter with pastry cutter, until texture of coarse meal. Stir in coconut.Sprinkle top of pie to within 2" of center.Bake @ 375 degrees for 10 to 12 minutes or until coconut is toasted.