The crossword solution for the term 'Swerve Off Course' is YAW, which is a three-letter word. YAW is an aeronautical term that refers to the side-to-side movement of an aircraft or other object in relation to its forward motion. It is also used to describe the turning of a vehicle away from its intended course. In this context, swerving off course implies that the vehicle has deviated from its intended path.