Fresh Clam And Noodle Soup

Name: Fresh Clam And Noodle Soup
Ingredients: 1/4 cup extra-virgin olive oil, plus more for drizzling; 1 large onion, finely chopped; 2 medium carrots, thinly sliced; 2 celery ribs, thinly sliced; 4 garlic cloves, thinly sliced; One 14 1/2-ounce can diced tomatoes; 2 cups bottled clam juice; 2 cups chicken stock or low-sodium broth; 1/2 cup dry white wine; 1 tablespoon tomato paste; Large pinch of saffron threads, crumbled; 1/4 pound thin spaghetti, broken into 1-inch pieces (1 cup); 2 pounds cockles or Manila clams, scrubbed; Three 1-inch strips of orange zest; Freshly ground pepper