Andouille, Crab & Oyster Gumbo

Ingredients

• 1/2 cup all-purpose flour
• 1/2 cup vegetable oil
• 1 pound andouille sausage, sliced 1/4 inch thick
• 3 large celery ribs, cut into 1/2-inch dice
• 1 onion, cut into 1/2-inch dice
• 1 red bell pepper, cut into 1/2-inch dice
• 1 habanero chile, minced and most seeds discarded
• 3 garlic cloves, minced
• 1/2 pound okra, sliced 1/4 inch thick
• 2 teaspoons dried thyme
• 1 bay leaf
• 3 tablespoons filé powder (see Note)
• 5 cups chicken stock or low-sodium broth
• 3 cups bottled clam juice
• 3 tablespoons Worcestershire sauce
• 3 large tomatoes, finely chopped
• 1 pound lump crabmeat, picked over
• 2 dozen shucked oysters and their liquor
• Salt
• freshly ground pepper
• Steamed rice or crusty bread, for serving