Related Clues:

• Humpty Dumpty as an intellectual?
• Cerebral one
• The E in Einstein's formula
• Thermodynamic concern
• Vim and vigor
• Dynamism
• Couch potato's lack
• Nerdy type
• Vibe
• Intellectual
• "E," to Einstein
• ___ bar
• Fuel
• Walking encyclopedia
• Einstein's ''E''