1In 4- to 5-quart Dutch oven, melt butter over medium heat. Cook garlic and shallots in butter, stirring occasionally, until tender. Add flour; cook 1 minute, stirring constantly. Add clam juice and wine; cook 2 minutes, stirring constantly, until thickened.
2Stir in Worcestershire sauce, Cajun seasoning, pepper and whipping cream. Cook until thoroughly heated, about 10 minutes. Stir in oysters and crabmeat; cook just until edges of oysters curl. Serve with oyster crackers; sprinkle with parsley.