Doolin Irish Seafood Chowder

Name: Doolin Irish Seafood Chowder
Ingredients: 2 tablespoons unsalted butter (preferably Irish); 1 tablespoon all-purpose flour; 1 medium onion, finely diced; 1 large carrot, finely diced; 1 celery rib, finely diced; 2 medium golden potatoes, peeled and diced; 2 ounces smoked fish fillet (salmon or haddock); 1 lb clams or 1 lb mussel meat; 8 ounces clam juice; 8 ounces of cubed fish (mixture of salmon and a white fish such as haddock, pollock, hake, or cod); 1 cup heavy cream; 2 cups seafood stock; salt and pepper