Related Clues:

• Hook up
• Architectural wing
• Auxiliary building
• Attach firmly
• Attribute (to)
• Email option
• Iron on, e.g.
• Attach (to)
• Supplementary structure
• Extension on the main building
• Staple or clip on, e.g.
• Hook or hitch
• Subsidiary building
• Incorporate into a city
• Use a paper clip