Preheat the oven to 425 degrees Fahrenheit/220 degrees Celsius. Place cashews in blender.
Blend the cashews with ¾ cup water until very smooth. You might need to soak the cashews first for 30 minutes if your blender isn't very powerful.
Place the blended cashew cream in a bowl with the sugar, pumpkin puree, ground cinnamon, ginger, nutmeg and cloves, if using, corn starch, salt and pure vanilla extract.
Stir until well-mixed.
Roll out the pie crust dough on a floured surface to a diameter slightly larger than a 9-inch pie plate. Gently transfer the dough to the pie plate and fit it in. Crimp the edges. If using a premade crust you can skip this step.
Pour the prepared pumpkin pie filling into the crust. Place the pie plate on a baking sheet and place on the center rack in the oven. Bake 10 minutes, then lower heat to 350 degrees Fahrenheit/175 degrees Celsius and bake another 50-60 minutes or until the pie has set.
Cool the pie to room temperature on a wire rack. Place in the refrigerator and chill for another two hours or longer before slicing.