Combine first 4 ingredients (mixture will be crumbly). Firmly press crumb mixture into bottom of a 9-inch springform pan coated with cooking spray.
Bake at 350 for 10 minutes; cool on a wire rack.
Combine pumpkin and the next 4 ingredients (through cloves) in a bowl. Soften 6 cups ice cream; add to pumpkin mixture, stirring to blend. Spoon half of mixture into prepared pan. Cover with plastic wrap; freeze 1 hour or until firm. Cover and freeze remaining pumpkin ice cream.