Possible Clues:

• Description of maverick group that gets under your skin?
• Shard
• Wood fragment
• Sprinter takes initial left instead of right and has a break-down!
• Sharp wood fragment, painful in flesh
• Element in diamond
• Rat who mentors the Teenage Mutant Turtles
• Sliver
• Sliver of wood, sore in the flesh
• Thin sharp piece of wood or glass