The term 'of one's OWN' is a phrase that is used to describe something that is owned or controlled by an individual. In this case, the crossword solution for the term is OWN, which is a three-letter word. Owning something means that the individual has control over it and can make decisions about it without having to consult anyone else. This phrase is often used in legal contexts to refer to property or other assets that are owned by an individual.