Possible Clues:

• ___ bono
• __ bono: "Who stands to gain?" in law
• '-- bono' ('To what purpose?')
• ___ bono (for whose benefit?: Lat.)
• '-- bono' ('For whose benefit?')
• Russian music critic CГ©sar
• Russian composer CГ©sar
• "--- bono?" (for whose benefit?)