Related Clues:

• Well briefed about
• Word with catch or hang
• Not deceived by
• Not in the dark about
• Savvy about
• Party to
• Not excluded
• ''Once --- a Mattress''
• Barge --- (interrupt)
• "--- futher review..."
• Clued in
• Second word in a fairy tale
• Well aware of
• Upon
• Handling capably