Possible Clues:

• Horse with patches of white and another colour
• Horse son walked randomly round centre of stables
• Wonky without 23 in two colours
• It' s crooked, hairless, and maybe brown and white
• (Horse) with white and coloured marks
• (Horse) with white patches
• Bareheaded, going after crooked horse
• Suddenly change direction to left, boxed in by inferior horse
• Biased like William Hague, say, and anything but black and white
• Bicoloured creature, asymmetrical like a coot