Possible Clues:

• Criminal file that's wrong put right
• Lag back in the centre file
• Unpardonable one?
• In response to declining sales, the photojournalism magazine launched a campaign to turn the short-term subscriber into a ___
• One with much time on his hands
• Permanent cell occupier
• Maximum term prisoner
• Con with no chance for parole
• Pen resident
• Fellow in stand runs, one never getting out