Related Clues:

• Peculiar code, peculiar etiquette
• New code with drink to establish decency
• Furnishing for top people with money shows good taste
• Singular art style initially shows good taste
• Art's follower has curious propriety
• Duke concerned with environment with curious propriety
• Bang on about Italian novelist's good form
• Month with zero spirit, and total propriety
• Fairness shown in study about church with discontented clergy
• Awfully rude about firm -- Master requires propriety
• Need cycle to tour, disregarding the French modesty
• Appropriate behaviour from Italian writer caught in snare, perhaps
• Colour scheme by mummy oddly ignored good taste
• ... which is becoming odd after 1920s art style
• Behaviour that's becoming weird after code�s broken