MIX broth, barbecue sauce and oregano in slow cooker. Add all remaining ingredients except flour and water; toss to coat. Cover with lid. Cook on LOW 8 to 9 hours (or on HIGH 4 to 5 hours).
TRANSFER meat and vegetables to serving bowl with slotted spoon; cover to keep warm.
MIX flour and water until blended. Stir into juices in slow cooker; cover. Cook on HIGH 15 min. or until slightly thickened. Spoon over meat and vegetables.
serving size = 1-2/3 cups (400 mL)