Possible Clues:

• Olympian's achievement
• An Olympic athlete might set one
• Something an elite athlete might set
• 9.58 seconds, for the men's 100-meter dash
• Athletic best
• Olympian ambition
• Joey Chestnut's 73.5 hot dogs in 10 minutes, e.g
• Olympian's ultimate achievement
• Olympian's achievement, perhaps