Related Clues:

• Other half
• Other sock, say
• Play or room follower
• Fischer coup de grace
• Team up with partner
• Away, or no longer on the menu perhaps
• Pal on team
• Team for spouse
• Of food, begining to decay
• Away, or beginning to decay
• Sour, turned
• Fellow member, partner
• Gone away or gone stale
• Ship's officer or marital partner
• Officer below master on a commercial ship