Remove turkey from slow cooker. Remove bones from turkey; discard bones. Place turkey on a platter. Pour cooking liquid and orange sections into a medium saucepan, reserving 1/4 cup cooking liquid. Combine reserved cooking liquid and cornstarch in a small bowl, stirring with a whisk until smooth. Stir cornstarch mixture into orange mixture in saucepan. Bring to a boil; cook, stirring constantly, 1 minute or until sauce thickens.