Finely chop the fresh dill and dill pickle spear. The finer the chop, the smoother your sauce will be.
In a medium bowl, combine the mayonnaise, sour cream, chopped dill, chopped pickle, Worcestershire sauce, Dijon mustard, lemon juice, salt, and pepper.
Mix everything together with a whisk or spoon until the sauce is creamy and well blended.
Cover and refrigerate the tartar sauce for at least 30 minutes to allow the flavors to fully develop.
Stir once more before serving. Pairs perfectly with fried fish, shrimp, crab cakes, or crispy fries.