In a heavy 4 quart pot, brown meat in oil and butter.Add onion; cook until onion is soft.Add remaining ingredients, except flour and water.Cover and simmer 2 to 3 hours or until meat is tender, turning meat, occasionally.Remove meat to a serving platter. Keep warm.To make gravy, dissolve flour in water.Add 2 tbsp. Hot cooking drippings and blend well;add to remaining drippings.Cook stirring until thickened.Serve sliced meat with hot gravy.Makes 6 to 8 servings.