Possible Clues:

• Reversed, in telegram, magical foreign letter
• Letter three before zeta
• Y-shaped lowercase Greek letter
• Graduate school first to get low grade
• Written backwards in telegram, magical letter from Greece
• Delta follows it a short distance into Georgia
• Ganymede start
• Character from Plato’s mostly lame answer
• Letter from Greece going abroad, mailed miles afield initially
• Poor mark in school got by scholar