Bordeaux and Irish county twinned initially (6)
I believe the answer is:
claret
'bordeaux' is the definition.
(I've seen this before)
'irish county twinned initially' is the wordplay.
'irish county' becomes 'clare' (County Clare in Ireland).
'initially' says to take the initial letters.
The first letter of 'twinned' is 't'.
'clare'+'t'='CLARET'
'and' is the link.
(Other definitions for claret that I've seen before include "Purplish-red - blood" , "in one's veins?" , "Shade of red" , "Dark red Bordeaux wine" , "Cartel for Bordeaux red wine" .)