Possible Clues:

• Title of officer with supervisory duties, perhaps in prison
• Campaign pursued by Shelter and the Guardian
• Jug head?
• Conflict over retreat of custodian
• Governor of the Cinque Ports has this title
• It's up to Edward not to be even half-baked if there's someone to look after him
• Game official
• Jailer
• Official with supervisory duties, as in relation to a church
• Keeper of an Anderson shelter?