Bear has no right to invest (5)
I believe the answer is:
endue
'invest' is the definition.
(synonyms)
'bear has no right' is the wordplay.
'bear has no' becomes 'en' (I can't explain this - if you can you should give a lot more credence to this answer).
'right' becomes 'due' (due is a kind of right).
'en'+'due'='ENDUE'
'to' is the link.
Can you help me to learn more?
(Other definitions for endue that I've seen before include "Invest - provide" , "Supply or provide" , "Furnish" , "Put on clothes" , "Invest - supply" .)