Bond takes drink after knock (7)
I believe the answer is:
rapport
'bond' is the definition.
(I've seen this before)
'drink after knock' is the wordplay.
'drink' becomes 'port' (port is a kind of drink).
'after' says to put letters next to each other.
'knock' becomes 'rap' (synonyms).
'port' put after 'rap' is 'RAPPORT'.
'takes' is the link.
(Other definitions for rapport that I've seen before include "Feeling of sympathy and understanding" , "Close relationship with a common understanding" , "Feeling of affinity and harmony" , "Harmonious and understanding relationship between people" , "Sympathetic understanding" .)