French blue cheese (9)
I believe the answer is:
roquefort
'french blue cheese' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for roquefort that I've seen before include "French blue cheese" , "French blue-veined cheese" , "French cheese - for torque (anag)" , "Cheese made from ewes' and goats' milk" , "Soft blue ewe's cheese" .)