Related Clues:

• Vacancy left in reserve
• Token of love interrupting part of service: touching!
• Not written upon
• Void (of writing, thought, etc)
• Clever stratagem in operation? It may mean you pay less
• Emotionless, as a stare
• Not written on, as paper
• Empty space left in row
• Space on a form
• Poker-faced barman gets first character¿s assumed name on the weekend
• Space for wet blankets missing tweets
• Scrabble player's asset
• Rely on keeping large amount of space empty
• Not written on; (look) uncomprehending
• Bare; uncomprehending (look)