Possible Clues:

• Vital support mechanism raising the Roman cat
• Essential support (read by palmists?)
• Large one like cat needs escape option
• *Outside help on 'Who Wants to Be a Millionaire'
• Rope from a ship, say
• Long Island cat's salvation?
• Vital supply route
• Rescue is on hand for some readers
• Means of rescue originally liberating one like Garfield?
• Rescuer put cat on lithium