Possible Clues:

• Possibly remote stronghold put in broadcast
• Set of buttons important at home
• Important tablet for writer's block?
• ATM or smartphone feature
• Part of entrance security vital to flat
• Important, flat device with push-button controls
• Security system component
• On which 747 is sir given important place to sleep?
• A flat tablet may have this
• Remote, perhaps essential, placed on cushion