The term 'leave one's seat' can be expressed in three different ways using crossword solutions. The first solution is 'RISE' which is a four letter word. This means to move from a lower to a higher position, typically from sitting or lying down to standing. The second solution is 'ARISE' which is a five letter word. This means to get up from a lying, sitting, or kneeling position. The third solution is 'STAND' which is also a five letter word. This means to move into an upright position on the feet. All three solutions refer to the same action of leaving one's seat.