Place the turkey breast in a large bowl.
Whisk together honey, soy sauce, oil, ginger, cinnamon, ground cloves, garlic powder, salt and pepper in a mixing bowl.
Pour the mixture over the turkey breast and marinate at room temperature for 1 hour; turn the turkey and continue to marinate breast side up for 1 more hour.
Transfer the turkey and the marinade to the pot/bowl of your slow cooker.
Cover and cook on LOW for 5 to 6 hours. The turkey is done when it reaches 165°F in the thickest part of the breast meat.
Preheat oven to 400F.
Remove ceramic pot from the slow cooker; take the ceramic pot, with the turkey breast in it, and put it in the oven.
Continue to cook for 30 minutes, basting the turkey breast every 5 minutes, until the pop-up timer in the turkey breast pops.
Remove turkey from oven and reserve 2 cups of the liquid. If you don't have full 2 cups of liquid left over, add chicken broth to make 2 cups.