Bond returns and admits defeat (6)
I believe the answer is:
yields
I believe this clue is a double definition.
'bond returns' is the first definition.
(returns on a financial bond)
'admits defeat' is the second definition.
'and' acts as a link.
(Other definitions for yields that I've seen before include "bows" , "Cedes" , "Succumbs" , "Produces or gives in" , "Amounts harvested" .)