Possible Clues:

• Cruel
• Sadistic
• In the end, Clement loses the head with what he heard in confession, as it's diabolical
• Cruel and stupid to constrict busy sound
• Not nice to animals
• Childish about smell being severe
• Cruel and senseless to sing inside
• Savage that's inane about a tight-lipped sound
• Heartless fellow wearing trendy colour
• Cruel and stupid, when about to impose on ...