Related Clues:

• Opens fastener or causes the ruin of
• It may get sent about age, but this cancels it out
• One makes it so loose when so nude
• So 30 across makes this not so tight
• Dummy letters in cryptography
• Sets to zero
• Things of no value to students in their union
• Denies beaten army leaves East Germany in disguise
• Renders invalid
• Denies entrance into cosy home, when time has passed
• Dummy letters in ciphers
• Voids partners?
• Counteracts
• Cancels, roughly speaking, any openings
• Opens with deer in the sun, playing