Possible Clues:

• Boxing class
• Sportsperson began with wrongly securing headwear
• One fights egg producer with rowing team
• Boxer cheers maiden with rowing crew at bar
• What big, mean delinquent has time for diminutive fighter?
• Ring man's bird with number?
• How one might categorise fighter that's knocked out mate with bang
• Fighter, chicken with a spider's legs
• After suspension, wonder about marks received by drunken fighter
• Boxing category