Related Clues:

• Removing centre from corn on the cob is a puzzle
• It can be hard to get out of
• Setting for a rat race?
• Puzzle in a cornfield, perhaps
• PM's spoken of 'complex network, difficult to leave'
• Cornfield puzzle
• Pencil-and-paper puzzle
• Diversion on a kid's place mat
• Puzzle on a place mat, perhaps
• Puzzle in which people take turns solving
• Diversion on a place mat
• Cornfield diversion
• Intricate garden feature
• Paper puzzle with a winding path
• What a lab rat may navigate