Related Clues:

• 'So funny!'
• Landscape feature of two hectares
• Sunken barrier
• Wall that’s sunk for a bit of a laugh?
• Ditch with wall; laugh
• Sunken fence or wall
• Sunken boundary
• Boundary marker set in ditch? Very funny!
• Henry getting answer twice? That’s a laugh
• Sunken wall
• Boundary hidden at first: I’ve found it!