Related Clues:

• Mentally blessed
• Word that can precede the last word of 17-, 24-, 48- and 58-Across
• Ingenious
• Like a brainiac
• Cartoonist Young
• Like most fast sudoku solvers
• Evert of tennis
• At the head of one's class
• Sting a bit
• Soigné
• Snazzy
• Of high intelligence
• Shoe phone user
• Dressed by Armani, e.g.
• "Très ___!"