Related Clues:

• Bone: Pref.
• ''Hamlet'' prop
• Brain container
• Path opening?
• Jolly Roger's image
• Prefix with sclerosis
• Prefix with ''arthritis''
• Prefix with -path
• ''Bone'' prefix
• Brain protector
• Trepanation pokes holes in it
• Arthritis preceder
• Path starter
• Porosis and therapy beginning
• Bony beginning