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.
The accusative case (abbreviated acc) of a noun is the grammatical case used to mark the direct object of a transitive verb. The same case is used in many languages for the objects of (some or all) prepositions.It is a noun that is having something done to it, usually joined (such as in Latin) with the nominative case.he accusative singular is identical either to the nominative (often called nominative-accusative) or the genitive (genitive-accusative). In plural, only nominative-accusative exists. The active verb forms usually require the total object in the genitive-accusative and passive forms take the nominative-accusative.