Related Clues:

• Knowing about
• Au courant
• Watchful
• Vigilant
• On one's toes
• Informed
• See 27-Down
• Cognizant
• Made an additional recipient, for short
• Fully up-to-date
• Not out of it
• Clued in
• Posted, so to speak
• Tuned in to
• Well-apprised