Possible Clues:

• Funny bone's __ nerve
• Painful narrow segment of bone
• Like the nerve responsible for the 'funny bone' feeling
• Piece of insightful narrative on member's part?
• Like the nerve we call the 'funny bone'
• ___ nerve entrapment (cause of tingling fingers)
• Lunar cycle related to a bone
• Partly useful — narrow like some bones
• Like part of arm of satellite, left to drop
• Useful narrow section of a bone