Art of stuffing (9)
I believe the answer is:
taxidermy
'art of stuffing' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for taxidermy that I've seen before include "preservation process" , "way of stuffing goose etc" , "Stuffing things" , "Mounting horses" , "The art of stuffing and mounting animal skins" .)