The term PART OF A RACE can be broken down into two crossword solutions: LEG (3 letters) and LAP (3 letters). A LEG is a section of a race, usually referring to a long-distance race such as a marathon. A LAP is a single circuit of a track or course, and is often used to refer to shorter races such as sprints. Both legs and laps are integral parts of any race, and are used to measure the progress of a runner or team.