Related Clues:

• Aware of
• On the peak of
• Familiar with
• 'Once ___ a time...'
• Straddling
• 'I'm ___ you!'
• In the know
• See 45-Across
• Riding
• Savvy
• ___ reflection
• Drifters' '___ the Roof'
• Well-informed about
• Conscious
• After