Bond brings eastern men into court (6)
I believe the answer is:
cement
'bond' is the definition.
(I've seen this before)
'eastern men into court' is the wordplay.
'eastern' becomes 'e'.
'into' means one lot of letters goes inside another.
'court' becomes 'ct'.
'e'+'men'='emen'
'emen' put within 'ct' is 'CEMENT'.
'brings' acts as a link.
(Other definitions for cement that I've seen before include "Brick fixer" , "binder" , "material for bonding" , "Ingredient of concrete" , "It hardens when water is added" .)