One's plated prime duck with a herb stuffing (9)
I believe the answer is:
armadillo
'stuffing' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'one's plated prime duck with a herb' is the wordplay.
I cannot really see how this works, but
'prime' could be 'arm' (I've seen this before) and 'arm' is found within the answer.
'duck' could be 'o' (resembles zero - 'duck' in cricket) and 'o' is present in the answer.
'a' is within the answer.
'herb' could be 'dill' (dill is a kind of herb) and 'dill' is present in the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for armadillo that I've seen before include "S. Am. plated mammal" , "Plated burrowing animal" , "Horny-plated creature" , "Molar laid out for the horny-plated animal" , "9ed [SHELLED] beast" .)