Dead duck, not killed, unfortunately cited as pertinent (7)
I believe the answer is:
adduced
'dead' is the definition.
The answer and definition are not the same part of speech. However, past participle verbs and adjectives sometimes mean the same thing.
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for adduced that I've seen before include "Quoted" , "Cited as an example" , "Specified" .)