Possible Clues:

• Constabulary member
• Whistle-blower, at times
• Officer taking a mo with pencil possibly
• He's got a lot of unhappiness, according to Gilbert
• One who may be held in great regard in Ireland, by the sound of it
• Member of the Garda, say
• Garda
• Guard him to guard one
• One sleeping in the street — attracts his attention?
• Open claim (anag.)