Stuffing starter of turkey with mix ready for cooking (9)
I believe the answer is:
taxidermy
'stuffing' is the definition.
(stuffing dead animals)
'starter of turkey with mix ready for cooking' is the wordplay.
'starter of' suggests taking the first letters.
'with' is a charade indicator (letters next to each other).
'for cooking' indicates anagramming the letters.
The initial letter of 'turkey' is 't'.
'mix'+'ready'='mixready'
'mixready' anagrammed gives 'axidermy'.
't'+'axidermy'='TAXIDERMY'
(Other definitions for taxidermy that I've seen before include "Stuffing practice" , "preservation process" , "Art of stuffing animals" , "way of stuffing goose etc" , "A way to preserve wildlife?" .)