Subdued, being married together (5)
I believe the answer is:
cowed
'subdued' is the definition.
(I've seen this before)
'married together' is the wordplay.
'married' becomes 'co' (I am not sure about this - if you are sure you should believe this answer much more).
'together' becomes 'wed' (I've seen this in another clue).
'co'+'wed'='COWED'
'being' is the link.
(Other definitions for cowed that I've seen before include "Subdued in bovine way?" , "Subdued, kept under" , "Browbeaten" , "Intimidated, subdued" , "Overawed" .)