Possible Clues:

• Someone as good as dead
• One destined to enter grave without prayer?
• Person with no future an individual in Greece
• Irretrievable thing
• Dead one put down in King George?
• King George set about a certain hopeless case
• It's done for G and R, perhaps (5)
• One without hope
• In this one is done for
• Individual captured by Greek, one with no future