Possible Clues:

• Distance of China cat from safety measure
• A source of salvation in a crisis
• It is thrown to people in need of rescue
• What a catty way at last so to give one some help
• 'Who Wants to Be a Millionaire' aid
• Cat past fifty-one - is it making use of its ninth?
• Indispensable aid
• Being catty after fifty-one may save you
• "...Millionaire" aid
• Left one cat a means of escape