Related Clues:

• In the know about
• Aware of
• Familiar with
• Aware of, slangily
• Abreast of
• In on
• Informed
• Up on, as the jive
• Not in the dark about
• Savvy about
• Well aware of
• Informed about
• Aware of, to cool cats
• Clued in about
• In on, slangily