The term 'NOT YOURS' can be broken down into two crossword solutions: MINE (4 letters) and OTHERS (8 letters). The word 'MINE' is a possessive pronoun that is used to indicate ownership or possession of something. It is often used in contrast with the word 'YOURS, ' which is also a possessive pronoun but is used to indicate ownership or possession by someone else. The word 'OTHERS' is a pronoun that is used to refer to people or things that are not the speaker or the person being addressed. It is often used to refer to a group of people or things that are distinct from the speaker or the person being addressed.