Clue: Prehistoric animal expert, on holiday in Paris, purchases unusual shrunken heads (8)
Answer: EOHIPPUS
Explanation: Prehistoric animal expert, on holiday in Paris, purchases unusual shrunken heads (8)
First letters [*heads*] of **E**xpert **O**n **H**oliday **I**n **P**aris **P**urchases **U**nusual **S**hrunken