The term 'Goes off on a tangent' is used to describe when someone strays from the main topic of conversation and starts talking about something unrelated. The crossword solutions for this term are YAWS (4 letters) and VEERS (5 letters). YAWS is an archaic word meaning to deviate or swerve from a course, while veers means to turn or change direction suddenly. Both words can be used to describe the action of going off on a tangent.