Related Clues:

• Ring round
• Short period of intense activity
• Husband's unusual gift-wrapped box
• Strive, struggle
• Fight; instance of illness
• Scrap of paper found outside East London school?
• Engage in combat
• Pay-per-view event, sometimes
• All hits all the time?
• Boxing contest
• Engagement ring
• (Drinking) session
• Soldiers abandon cargo for battle
• An exchange of blows, but there's nothing in it
• Boxer's first to get unconscious in contest