Related Clues:
- Watch out! There's a great big hole!
- Underground space
- Pothole -- beware!
- Crude, small single-storey building
- Take care in underground passage
- Beware of schoolboys
- Large grotto
- Hollow Conservative greeting
- Beware of a dark place
- Pre-hike holler
- Bat's underground home
- Batman's hangout
- Shack closed, not opening
- Quarterback's bark
- 82 Across home