Preheat the oven to 425°F. Line a baking sheet with parchment paper; set aside.
In a food processor, mix the flour, sugar, baking powder, salt, cinnamon, nutmeg, cloves and ginger. Add the cubed butter and mix again until the texture resembles coarse cornmeal, about 30 seconds.
In a separate bowl, whisk together the pumpkin, heavy cream and egg. Pour the flour mixture into a large bowl. Make a well in the center and pour in the wet ingredients. Fold and knead the dough until you can form a ball. Flatten dough and make into a circle, about 1 inch thick. Use a sharp knife and cut into 8 pieces.
Place scones on parchment paper lined baking sheets, and bake for approximately 15 minutes, until golden brown and toothpick inserted comes out clean.
Move scones to wire rack to cool.
While the scones are cooling, make the spiced glaze. Mix all the spiced glaze ingredients in a bowl with a spoon. You may need to add more milk to get the right consistency on your glaze. Then pour the glaze into a piping bag, cut off a small point at the tip and drizzle the glaze on the scones in a zigzag pattern.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.