Fur returned to the French firm (6)
I believe the answer is:
ocelot
'fur' is the definition.
(I've seen this before)
'returned to the french firm' is the wordplay.
'returned' says the letters should be written backwards.
'the french' becomes 'le' ('the' in French).
'firm' becomes 'co' (a firm is a company).
'to'+'le'+'co'='toleco'
'toleco' backwards is 'OCELOT'.
(Other definitions for ocelot that I've seen before include "Small leopardlike cat" , "Feline mammal" , "American wild cat" , "Leopard-like cat of S America" , "Wild creature" .)