Related Clues:

• "The only sure bait when you angle for praise": Lord Chesterfield
• Unassuming nature
• Proper behavior
• "Aw, shucks" quality
• Unwillingness to boast
• Dignity of behaviour or proceedings
• Correctness or dignity of behaviour
• Dignity of behaviour or procedure
• Propriety in manners and conduct
• Correct behaviour
• The fashion is never so bold when it comes to such a dirty place
• Be having a drink at last
• The sort of art that's odd but proper
• Nothing forward in the manner of a dirty house
• Being shy in the manner of the piggery