The term 'INNER PART' can be solved by the crossword solution 'INSIDE' which is a six letter word. It is used to describe the innermost part of something, such as the INSIDE of a building or the inner workings of a machine. It can also refer to the most private and personal aspects of a person's life. It is often used to describe the core of an individual's being, such as their thoughts, feelings, and beliefs.