Related Clues:
- Keep quiet about police providing cover
- Narrow racing boat
- Turtle topper
- Protective outer case
- Tortoise topper
- Sword master's case
- Sea item sold by 39-Down, in a tongue-twister
- Second piece of open country gets protection
- Lead in shoplifting case
- Mussels marinara discard
- Son having nightmare sees skeleton
- Hard cover, often?
- Conch, perhaps
- Use artillery for cover
- Oyster's "home"