Related Clues:

• Flee the premises
• Throw your hat in the ring
• Train for a marathon
• Does a 10K
• Set of twenty
• Twenty years
• Twenty, to Lincoln
• Get past third base
• See 63 Across
• Be in a footrace
• Try to be elected
• Quick trot
• "Head for the hills!"
• Go home, maybe
• Points, in baseball