Related Clues:
- Cell signal strength indicators
- Structures near cell walls
- They need tending
- Carrie Nations targets
- Candy-shop display
- Forms of chocolate
- Zoo keepers?
- Rods or drink dispensers
- Metal rods or pubs
- Drinking establishments
- Prohibiting decree
- Places to get screwdrivers
- Captain's insignia
- Restrictions, like the ones on PA systems that necessitate the 'human microphone' at Occupy Wall Street
- Universal product code elements