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.
E. Partitive Genitive (Wholative) - The genitive substantive (preceded by the article) can indicate the whole of which the head noun is a part. The word of can be substituted the words  which is a part of . This use of the genitive requires the head noun to in some way imply or indicate portion.E.g .. 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).