Related Clues:

• Out-of-print
• One in a million, say
• Pink, maybe
• Well-done's opposite
• Of particular interest to a completist
• Chophouse choice
• Porterhouse order
• Like proverbial hen's teeth
• Short of medium
• Hardly seen
• Hardly well done
• Like inverted Jenny stamps
• Almost unique
• Undercooked
• On the pink side