What is cloning in inheritance?

Perhaps the questioner is referring to munasakha (successive inheritance), which, according to scholars of inheritance, occurs when a person dies before their estate is distributed, and then one or more of their heirs also dies. It is called munasakha because the first inheritance case is superseded by the second, or because the wealth transfers therein from one heir to another. It is derived from naskh, meaning transfer and removal, as the inheritance transfers from the first heir to the second before the first heir takes possession of it. Its details are found in the books of the scholars of inheritance.