Related Clues:

• Current
• Over
• On
• '___ the housetop...' (Christmas lyric)
• Fairy tale's second word
• In the know about
• Aware of
• On the peak of
• Familiar with
• 'Once ___ a time...'
• Straddling
• In the know
• Riding
• ___ reflection
• Drifters' '___ the Roof'