Possible Clues:

• Last-eaten part of a loaf, often
• End of a loaf or loafer
• Foremost of hunted fish in list
• Most of posse fighting with this nasty piece of work could be hopeless
• Site of plantar fasciitis pain
• Elevator near an arch?
• You might limp if it breaks
• Crustiest piece of bread
• "Come to my side, pup!"
• List that won't be found 5 Down