Clue: Dark-haired animal in Marseille going round enclosure (8)
Answer: BRUNET[T]E
Explanation: Definition: Dark-haired
RUN (enclosure) in BÊTE (French for animal). I originally tried to parse this as NET (well, it's a kind of enclosure) in BRUTE (an animal, though not French), which has the extra flaw of clueing the extra T, so I was glad to find the correct explanation