Bachelor needs wife? An inductive fallacy (5,4)
I believe the answer is:
black swan
'inductive fallacy' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'bachelor needs wife? an' is the wordplay.
'bachelor' becomes 'B' (abbreviation e.g. BA=Bachelor of Arts).
'needs' becomes 'lacks' (lack is a kind of need).
'wife?' becomes 'w' (abbreviation).
'b'+'lacks'+'w'+'an'='BLACK SWAN'
Can you help me to learn more?
(Other definitions for black swan that I've seen before include "Australian winger" , "Australian native bird" , "Aquatic bird" , "Aussie swimmer" .)