Heat oven to 350 degrees F.
Grease a 1 quart baking dish. Halve squash and remove seeds; cut into quarters. Place quarters, skin side up, in dish and cover; bake 30 minutes.
Meanwhile, in medium bowl, combine apple, butter, brown sugar, cinnamon, nutmeg, and cloves.
Turn cut sides of acorn squash up; top with apple mixture. Cover and bake 30 minutes longer or until apples are tender.