Possible Clues:

• Largely woolly letter from abroad?
• Left Adam Cook over open bigotry in Greek letter
• Letter for one young Suffolk lawyer
• Beat bad, corrupt Greek character
• Relative behind 33 down is a Greek character
• Character from Greece turning ma bald!
• Greek character represented by ram?
• Greek character with bad back's terribly bad
• Young man entertains doctor with a Greek character
• Greek letter that symbolizes wavelength