Well, he wont offer much interest (4)
I believe the answer is:
bore
'offer much interest' is the definition.
The answer and definition can be both human attributes as well as being singular nouns.
Maybe there's a link between them I don't understand?
'well he wont' is the wordplay.
I cannot really understand how this works, but
'he' could be 'bo' and 'bo' is found within the answer.
The remaining letters 're' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for bore that I've seen before include "Drill or weary" , "Wearisome person" , "Pierce - weary - tidal flood" , "Dull person; hole" , "Drill or be tedious" .)