Related Clues:

• Proper behaviour of French company -- odd!
• Gentility
• Endless lure shown by strange modesty
• Acceptable behaviour
• Appropriate behaviour for environmentalist breaking into oil storage facility
• Art style with strange decency
• Grace period at end of year with no booze
• Good form and spirit underpinning a style of art
• Etiquette of French? Well, I'm not sure
• Propriety requires new code — bottom less than totally visible!
• ''Common'' quality
• Occasionally idler cleans empty cavity, in fairness
• Propriety of conduct
• Behaviour that's becoming odd -- almost lure into trap at first
• Sense of propriety