Possible Clues:

• Endures temperature, cold and damp that's ultimately unbearable
• *Breaking point
• Limit regulation covering two streets and road, oddly
• Could this have been the one that broke the camel¿s back? No, this was the one that was unbearable
• Continue with a type of hat which eventually overburdens you?
• At start of 2 down it is turned into gold by Rumpelstiltskin? Presumably, it does beastly type no good!
• American city road is converted into gold by Rumpelstiltskin? Presumably, it does beasty type no good!
• Back-breaking stress carries on over time, untreated
• Does it try to get a chick out of the kernel of it?