Preheat oven to 375°F. Line a 9-inch pie pan with the bottom crust; set aside.
In a large bowl, mix diced apples, raisins, currants, candied citron, brown sugar, cinnamon, nutmeg, and cloves well.
Stir apple cider (or brandy) and melted butter into the fruit until thoroughly combined and well coated.
Pour the mincemeat filling into the prepared pie crust, spreading it evenly.
Cover with the top crust. Trim excess dough, crimp edges to seal, and cut several small steam slits. Brush with beaten egg.
Bake for 45-50 minutes, until the crust is golden brown and the filling is bubbling through the slits. If the edges brown too quickly, cover them with foil.
Cool at least 30 minutes before slicing. Serve warm or at room temperature.