Related Clues:

• Headed up
• Competed in a 10K
• Succumbed to fear, maybe
• Competed in a marathon
• Accepted the nomination, say
• Not lost
• Japanese adaptation of "King Lear"
• Threw one's hat in the ring
• Cantered
• Kurosawa's ''King Lear''
• Went quickly
• Headed for the hills
• Exerted much effort
• Went lickety-split
• Beat a retreat