Related Clues:

• Array of calculator buttons
• Set of buttons important at home
• Important tablet for writer's block?
• The "D" of LED
• Important, flat device with push-button controls
• Part of entrance security vital to flat
• Light-emitting ___
• LED component?
• LED's "D"
• Island flat where one can find space and return?
• Part of 36-Across
• Push-button device
• Security on door vital at flat
• "D" of LED