Related Clues:

• Space inside a pen
• Honeycomb component
• Spreadsheet unit
• Honeycomb section
• Battery unit
• Amoebas have one
• Theater turn-off?
• Group in a spies' network
• Honeycomb chamber
• Con container
• Unit of life
• Honeycomb compartment
• Room in a convent
• Unit in a terrorist organization
• Prison room