Related Clues:

• Cranium
• ''Hamlet'' prop
• Brain container
• Jolly Roger's image
• Board game with the categories "Data Head" and "Word Worm"
• Board game with the categories 'Data Head' and 'Word Worm'
• Brain protector
• Trepanation pokes holes in it
• The head-bone
• The skull, bone enclosing brain
• The skull, major head bone
• Skull, bones enclosing brain
• There's a bra in the inside of this
• A nutcase
• Swot seen outside Ulster University is 'brainbox'