Fabric from animal hair (4)
I believe the answer is:
wool
'fabric from animal hair' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for wool that I've seen before include "Fabric from fleece" , "What can be pulled over eyes to deceive" , "Sheep's clothing" , "Fabric made from the hair of sheep" , "Sheep coat" .)