Possible Clues:

• Poet Robert Burns became this kind of official as a better use of his education than farming
• Duty officer
• Old smuggler's foe
• Former celebrity so upset revenue employee
• Smugglers' old adversary handles diamonds, covering mark on treasure map up
• Customs officer to remove crew
• Old customs official
• He is given the duty to remove staff
• Burns, say, to cut chap out
• Official rating for adult films once in English cinemas, perhaps