Slow Cooker Chicken Gumbo

Name: Slow Cooker Chicken Gumbo
Ingredients: 1/3 cup all-purpose flour; 1/3 cup cooking oil (a neutral-flavor oil, such as corn oil or canola); 3 cups chicken broth; 12 to 16 ounces smoked sausage (spicy sausage, such as andouille ), sliced about 1/2-inch thick; 2 to 3 cups diced cooked chicken; 1 1/2 cups sliced okra; 1 cup chopped onion; 1/2 cup chopped green pepper; 1/2 cup chopped celery; 4 cloves garlic, minced; Dash of salt, to taste; 1/2 teaspoon freshly ground black pepper; 1/4 teaspoon ground red pepper