Space
Else clues• ___ where prohibited
• Contract Null & ___ (mystery novel by Joe Gores)
• Abrogate
• Abyss
• Barren
• Cancel
• Cancellation notice
• Cancellation stamp
• Cardless suit
• Check word
• Declare invalid
• Deep space, for the most part
• Emptiness
• Empty
• Empty area or space
• Empty expanse
• Empty space
• Having no legal force
• Ineffective
• Inoperative
• Invalid
• Invalidate
• Invalidate, as a check
• Make invalid
• Missing a suit, in bridge
• Negate
• No longer in effect
• No longer in force
• No longer valid
• Not binding
• Not good
• Not in force
• Not legally binding
• Nothingness
• Null
• Null and ___
• Null companion
• Null partner
• Null's sidekick
• Nullify
• Of no legal effect
• Of no matter
• Out of cards in a suit
• Render useless
• Render worthless
• Rubber-stamped word on checks
• Sample-check word
• Set aside
• Stark
• Tear up, as a check
• Tear up, so to speak
• The Art of Love author
• Totally empty
• Totally lacking
• Unable to be cashed
• Uncashable
• Unfilled space
• Vacancy
• Vacuum
• Vast emptiness
• Word on a bad check
• Word on a check you won't cash
• Word on a sample check
• Word on bad checks
• Word on some checks
• Word stamped on a bad check
• The state of nonexistence
• An empty area or space