Heat the oven to 375°F. Fit the dough into a 9-inch deep-dish pie plate, fold the overhang under, and crimp the edge. Chill for 20 minutes.
Line the crust with parchment and fill with pie weights. Bake for 15 minutes. Remove the weights and parchment, then bake for 5 minutes.
Brush the inside of the crust with egg white and bake for 2 minutes. Reduce the oven to 350°F.
Whisk the pumpkin, eggs, brown sugar, evaporated milk, cinnamon, ginger, nutmeg, cloves, vanilla, and salt until smooth.
Pour the filling into the warm crust. Set the pie plate on a rimmed baking sheet and bake for 30 minutes.
Whisk the egg, brown sugar, maple syrup, melted butter, vanilla, and salt for the topping. Stir in the toasted pecans.
Remove the pie from the oven. Gently spoon the pecan mixture over the partially set pumpkin filling, working from the outer edge toward the center.
Shield the crust edge if it is already brown. Bake for 25 to 35 minutes more, until the edges are set and the center has a small jiggle. The middle should reach about 190°F to 195°F.
Cool on a rack for 2 hours. Refrigerate for at least 4 hours before slicing.