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.
In some languages, nouns in the genitive case also agree in case with the nouns they modify (that is, it is marked for two cases). This phenomenon is called suffixaufnahme. In some languages, nouns in the genitive case may be found in inclusio â that is, between the main nounâs article and the noun itself.