Possible Clues:

• Cowed and bust after getting a fine
• Having the willies
• Ready to run, perhaps
• Yellow, so to speak
• Scared of a loud attack
• Reluctantly admitting father dipped into a monetary donation
• Scared of American fellow mounting attack
• Chicken RAF cooked to assist
• 'Who's -- of Virginia Woolf?', a 1962 play by Edward Albee
• Trembling, say