A fictional run-down building, similar to a shack, in which witches dwell. Ostensibly, a hovel can be defined in terms of the habitation of a witch, as a witch would only choose to live in a hovel. In actual fact, not all hovels are inhabited by witches and not all witches live in hovels (see the witch in Hansel and Gretel), so the connection between the two is unclear.
Person 1: "What's that shack-like building over there?"
Person 2: "There's a cauldron outside, so presumably a hovel."
Person 1: "How can you be sure?"
Person 2: "Well cauldrons belong to witches and witches live in hovels so I'm simply exercising my deductive skills."