Secure, bind (6)
I believe the answer is:
fasten
I believe this is a double definition.
'secure' is the first definition.
(I know that secure can be written as fasten)
'bind' is the second definition.
(I know that bind is a more specific form of fasten)
(Other definitions for fasten that I've seen before include "Fix -- make tight" , "Tie or join together, fix firmly" , "Attach" , "Fix to, secure" , "Affix" .)