Related Clues:

• Resting atop
• Napoli's nation
• ''___ the Roof'' (Drifters song)
• Catch ___ (start to understand)
• Knowing, slangily
• Knowing, as a secret
• Part of the loop
• Hip about
• Astride
• Word with catch or latch
• Having knowledge of
• Not clueless about
• "Once __ a Mattress"
• "Hang ___ your hats"
• Fairy tale preposition