Possible Clues:

• With 60-Across, undefeated boxer who wrote the cookbook "Food for Life"
• First name in boxing
• Novelist Lalami
• Boxer Ali with a 24-0 record
• Retired pugilist Ali
• See 20-Across
• With 59-Across, boxer who retired undefeated
• Muhammad's undefeated daughter
• Boxer Ali who retired undefeated
• Ring great Ali