Possible Clues:

• Breaking point? Carries on returning growth
• Tipping Point? It's where shoes may be fashionable pale yellow colour
• Problem for camel's back continues, unsightly growth returning
• Endure something that sucks, a back-breaking burden
• Limit of one's patience
• No more suckers? That's intolerable!
• Starts off breaking regulation -- that's the limit!
• Endures temperature — bitterly cold — at breaking point
• Cherry on top, but bad
• Stalwart's sacked as final indignity