Make the dough: In a medium bowl, whisk together flour, sugar, and salt. Cut in cold butter and shortening until crumbly. Drizzle in ice water, mixing just until dough holds together. Divide into two discs (one slightly larger). Wrap and chill 30 minutes.
Prepare the filling: In a separate bowl, combine sliced apples with sugar, spices, lemon juice, and thickener. Let sit for 5–10 minutes.
Roll and fill: Roll out the bottom crust to 8 inches, fit into the pan, and fill with apple mixture. This is my favorite deep-dish 6 inch pie pan. Top and finish: Roll out top crust, cover pie, trim excess, and crimp edges. Cut steam vents and brush with egg wash if desired.
Bake: Place on a baking sheet and bake at 375°F (190°C) for 40–45 minutes until crust is golden and juices bubble.