The term 'RIDES A BIKE' can be broken down into two crossword solutions: 'PEDALS' and 'CYCLES'. To 'PEDAL' means to use a foot to push a PEDAL on a bicycle in order to move it forward. To 'CYCLE' means to ride a bicycle, which is a two-wheeled vehicle powered by the rider's legs. Therefore, the term 'RIDES A BIKE' can be summarized as the act of using one's feet to push PEDALS on a two-wheeled vehicle in order to move it forward.