The crossword solution for the term 'IT'S JUST A FORMALITY' is TIE, which is a three-letter word. A TIE is a piece of clothing that is worn around the neck and is typically associated with formal occasions. It is often seen as a sign of respect and is usually worn with a suit or other formal attire. The phrase 'it's just a formality' implies that something is done out of respect or tradition, rather than out of necessity.