Possible Clues:

• One on board is entitled to get one on the end
• Entitled to put one on the end of the skipper (7)
• The title gives one a rank with one on the end
• Entitled to be the skipper with one on the end
• Legend with a photograph
• Title with picture
• Explanation of an illustration
• Is the officer entitled to get Number One up here?
• Do the family hide this?
• The legend of officer no one backed