Possible Clues:

• Agreement about cut reaching hospital department, damaging
• Recklessly altered mint causing harm
• Tried to slop out potty — not helpful
• Awfully tired intellectual becomes harmful
• Tired out chaps returning belatedly, mostly -- it's bad
• Causing harm for the teeth eating alien marge
• Damaging
• Tired out, unstable and causing harm
• In time, right filling of teeth can be damaging
• Tired out in the mind, which is bad for one