Irish county team's leader in Bordeaux (6)
I believe the answer is:
claret
'bordeaux' is the definition.
(I've seen this before)
'irish county team's leader' is the wordplay.
'irish county' becomes 'clare'.
'leader' suggests taking the first letters.
The initial letter of 'teams' is 't'.
'clare'+'t'='CLARET'
'in' acts as a link.
(Other definitions for claret that I've seen before include "Dark purplish-red colour" , "Cartel for Bordeaux red wine" , "Dark red Bordeaux wine" , "Irish county almost makes a red wine" , "Red Bourdeaux wine" .)