Related Clues

• Master hand
• Black belt, say
• Masterful
• Whiz
• Puzzle-solving level
• Kind of witness
• Guru
• Maven
• Ace
• Pro
• Consultant, probably
• Know-nothing's opposite
• Authority
• Crackerjack
• Go-to guy
• Old pro
• Crossword puzzle solver with a pen, often
• Virtuoso
• Old hand
• Specialist