Related Clues:

• and void
• No longer enforceable
• Like sets with no elements
• Not operative
• Island resident about to go inside, doing nothing
• { }, in mathematics
• Empty, as a mathematical set
• Nutmeg caught in local doing nothing
• Sluggish, local inhabitant having caught cold on island
• Invalid somewhat unwell, unfit to get up
• __ and void (no longer valid)
• Fashionable mobile is not in service
• __ and void (not valid)
• ... and void, lacking any legal or binding force
• Still it gets held up in unfortunate cave-in