Related Clues:
- It should contain enough water to go round
- Water crossed via a drawbridge
- Water-filled ditch around stronghold
- Trench around castle
- Trench around building
- Water round a castle
- Pieces of mail
- Zoo's fence alternative
- Castle obstacle
- Castle-circling ditch
- Protective zoo feature
- Lancelot's outerwear
- Zoo protection
- Defensive excavation
- Mail for King Arthur