Board Thread:Theories and Speculation/@comment-3568954-20200620201752/@comment-4961229-20200621034924

Obito demonstrated that a soul could possess a living being and confer all its abilities on that person. Hagaromo demonstrated that souls could be summoned to the Impure World without anything like Edo Tensei. Dan Katō demonstrated that he could control his soul, delay returning to the Pure World, and possess a person, controlling them completely.

Some combination of these abilities or derivatives thereof would logically allow someone to control a soul and seal it within a clone. If the clone is grown to adulthood without a personality that body would become the souls new body.