Related Clues:

• Clued in
• Well aware of
• Upon
• Informed about
• Word with latch or catch
• Latch ___
• Hep
• Suspicious of
• 'Hold ___ your hat!'
• Catch --- (start to get)
• Sign ___ (accept, as a program)
• Fully aware of
• See 69-Across
• Not unaware of
• Wise to