Related Clues:

• Brothers over six feet? Too much to ask
• 'So ... who wants in on this deal?'
• Difficult request: a bit of buttered roll? A toastie's offered up
• Big ask
• Request that's hard to fulfill
• Tough challenge
• Difficult task, request for 12oz coffee in Starbucks?
• Really big ask
• "Does someone want in ... ?"