To make the crust: In a food processor, combine the flour, salt, and cold butter. Pulse until the mixture is the consistency of sand. Add the water while pulsing until the mixture comes together; being sure not to overwork it. (To mix the dough by hand, combine the flour, salt, and butter in a large bowl. Add the cold water and work by hand until the mixture comes together.) Remove the dough from the food processor or bowl on a lightly floured work surface. Shape it into disk about 1/2 inch thick. Wrap in plastic and refrigerate for at least 1 hour before rolling out.
To make the crumble: Combine the flour and sugar in a food processor until thoroughly combined. Add the butter and pulse until the mixture forms a crumble, being sure not to over mix. Refrigerate until ready to use.
To make the filling: In a large bowl, combine all of the ingredients. Using the back of a spoon, crush about 20 percent of the blueberries so the juice mixes with the cornstarch and thickens the filling.
To make the pie: Preheat the oven to 350 degrees. Butter and flour a 10-inch pie tin; set aside. On a lightly floured surface, roll out the dough. Place in pie tin, trim, and crimp the edges. Use a fork to poke holes around the sides and bottom of the crust. Chill until firm, about 20 minutes. Cover with a piece of parchment paper and fill it with dried beans. Bake until the crimped edges are firm, about 10 minutes. Remove the parchment paper and beans, and bake until the bottom is firm, about 10 minutes. Fill the crust with the berry mixture, spreading evenly, and top with the crumble. Place on a parchment paper-lined baking sheet, and bake until the filling starts to bubble, 1 to 1 1/4 hours. Remove, and cool on a wire rack.