Binds to new site (4)
I believe the answer is:
ties
'binds' is the definition.
('tie' can be a synonym of 'bind')
'new site' is the wordplay.
'new' indicates an anagram.
'site' is an anagram of 'TIES'.
'to' acts as a link.
(Other definitions for ties that I've seen before include "Binds with male neckwear" , "Drawn games" , "Fastens with a knot" , "allegiances" , "Items of neckwear" .)