Possible Clues:

• Display dummy
• Thomas, say, tailed horse-like figure
• Shop's dummy
• Model style mostly followed by one in five
• German writer, like an ass, ignoring European fashion model
• Married woman, one of five, becomes model
• Model that's still on display
• Model, short type, with one child of five
• Chap, born one of large family, is a dummy
• Name of horse briefly sat on by male model