Related Clues:

• Catch on (with ''up'')
• Omniscient
• Sharp-witted
• Like Ramakrishna
• Oracular
• Word with "clock" or "penny"
• Nobody's fool
• All-knowing
• Quick on the uptake
• Erudite
• Not easily misled
• Like a quick study
• Like an owl, proverbially
• Highly perceptive
• Prudent