Related Clues:
- Earthen wall adjacent to a ditch
- It may hold back the sea
- Elevated fortification
- Shoulder of the road
- Dutch construction
- Earthen embankment
- Site of Hans Brinker's heroism
- Canal bank
- Big bank investment?
- Water-level regulator
- Water retainer
- Military protection
- Embankment built for defensive purposes
- Bulwark, wall
- So to be on the defensive may make one a bit sheepish