Related Clues:

• 40-Across follower
• Greek letter after pi
• Mass-over-volume symbol
• P, on a fraternity sweater
• Letter after Pi
• Follower of pi
• Greek O
• Greek character wearing ring on right hand
• The right little house for a Greek character
• Greek short 'o'
• The fifteenth letter of the Greek alphabet
• Oar, we�re told, seven after 19
• No distance at all to go for a letter
• Letter delivered to Manor House
• Foreign character accommodated in superior hotel