Related Clues:

• Improve, as cheese
• What X and Y chromosomes determine
• Bringer of wisdom
• __-appropriate
• Develop flavor, perhaps
• License info
• Birthday spec
• Major span
• See 16
• See 11
• See 13
• Reason for an 'R' rating
• Calculation from tree rings
• 21, for many new drinkers
• What some golfers use as a scoring goal