One found by American poet wanting wife gone? (6)
I believe the answer is:
hitman
'by american poet wanting wife gone?' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'one' is the wordplay.
I cannot really understand how this works, but
'one' could be 'an' (an apple is one apple) and 'an' is present in the answer.
This explanation may well be incorrect...
'found' acts as a link.
(Other definitions for hitman that I've seen before include "killer" , "Assassin" , "offer?" , "Hired gun" .)