Coat mostly stuffed with good wool (6)
I believe the answer is:
angora
'wool' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for angora that I've seen before include "Breed of rabbit or cat, the former name for the Turkish capital" , "Cloth from the soft hair of a goat" , "Yarn or fabric made from goat hair" , "Fine yarn from hair of goats" , "Breed of goat, cat or rabbit" .)