1. Melt the butter over medium heat in a large pot. Add the carrots and celery, cook until just softened, 5-7 minutes. Sprinkle in the flour, and cook, stirring, for 1 minute. Pour in the chicken broth, add the garlic, chopped celery leaves, chopped parsley, sherry, and pepper. Bring to a boil and cook for one minute. Reduce heat, stir in crab meat and light cream, stir and cook over low heat until heated through.