Possible Clues:

• Typical (example)
• Accepted as excellent
• Quintessential cooling drink in small volume
• There's a girl among the oaks, for instance
• Traditional form preceding Inca, oddly
• Small volume about drink, work of the highest quality
• Oaks, for instance for one girl in two hundred
• Race, eg Derby
• The French entering the Civil Service - so exemplary
• Form gets 99 in Latin - great work!