As stated up there in my comment, Heatran is an ideal counter to Clefable. Standard Clefable sets have nothing to hit it. All you really need to do is keep it relatively healthy and you can stop Clefable easily. I suggest Heatran over other Steel types, and there is two reasons for this. The first is its Fire immunity, as most good Clefable sets run Flamethrower.
Definition. The genitive is the case (or function) of an inflected form of a noun or pronoun showing ownership, measurement, association, or source. Adjective: genitival. The suffix -'s on nouns is a marker of genitive case in English.
1. Subjective Genitive-The genitive substantive functions semantically as the subject of the verbal idea implicit in the head noun. To substantiate this thought, try to turn it into a sentence with the noun in the genitive as the subject.. Genitive of Direct Object-after certain verbs-Many verbs, such as those of the five physical senses and of emotion, etc., require that their direct object be in the genitive case (as opposed to the accusative case which is normally expected).