Possible Clues:

• Monkey's instant decline with damage to head
• It takes a primate so to spoil the medical clique
• Small bushy-tailed monkey
• Monkey's limb, swathed by doctor, restored to normal alignment
• Primate's limb held by doctor to put back after break
• Primate needed - second in stream, jostling
• Mare, most unusually, produces rather small creature
• Small tropical monkey
• That rat Moses may be made primate
• Mare most bothered by a monkey