Secure relationship (3)
I believe the answer is:
tie
I believe this is a double definition.
'secure' is the first definition.
(tying is a kind of securing)
'relationship' is the second definition.
(I know that tie is a type of relationship)
(Other definitions for tie that I've seen before include "Draw - connection" , "Obligation" , "'Fasten, with string say (3)'" , "Bind; be equal" , "Equal scores" .)