Long-haired rabbit breed (6)
I believe the answer is:
angora
(Other definitions for angora that I've seen before include "Breed of rabbit or cat, the former name for the Turkish capital" , "Long-haired cat, goat, or rabbit" , "A groan from a goat" , "Breed of goat with silky hair" , "Yarn made from hair of goats or rabbits" .)