The crossword solution for the term SPLIT OF JOIN is CLONE. A CLONE is an organism or cell that is genetically identical to its parent. Cloning is a process of creating a genetically identical copy of a living organism, which can be used for various purposes such as medical research and agriculture. Cloning has been used to create identical copies of plants and animals, and even human cells. Cloning is also used in genetic engineering, where genes from one organism are transferred to another organism to create a new organism with desired traits.