Perhaps a fatal attraction, ducky! (5)
I believe the answer is:
decoy
'ducky' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for decoy that I've seen before include "Imitation creature used to attract others" , "Entrap" , "Thing used to lure animal into trap" , "Red herring" , "It's used to lead into a trap" .)