Possible Clues:

• One affecting superior knowledge
• Smart-aleck it would be advisable to get the measure of
• Self-appointed sage
• Learned area of person affecting knowledge
• The know-all's sensible with port
• Know-all uses old way to contact Brazilian state
• Person who tries to appear clever
• A know-all's judicious measure
• Show-off calls out questions over plot of land
• One who's smart?