Possible Clues:

• Say it wasn't once used as a holster for a gun
• By the age of ten one may contradict this (6)
• This will make nothing of the entrance at last
• Nullify agent turning back on mole
• Deny wife escaping old prison
• Deny no-one outside access
• Rescind
• Deny the existence of
• Wipe out Newcastle's ticket sales?
• Deny development from age 10