Have to concede (3)
I believe the answer is:
own
This clue is a double definition.
'have' is the first definition.
(to have something is to own it)
'concede' is the second definition.
(I've seen this in another clue)
'to' is the link.
(Other definitions for own that I've seen before include "Acknowledge" , "Personal; possess" , "Have in one's possession" , "Possess or confess" , "Allow" .)