Swordsman in bar sure to get drunk (7)
I believe the answer is:
sabreur
'swordsman' is the definition.
(thesaurus)
'bar sure to get drunk' is the wordplay.
'to get drunk' indicates anagramming the letters.
'bar'+'sure'='barsure'
'barsure' with letters rearranged gives 'SABREUR'.
'in' is the link.
(Other definitions for sabreur that I've seen before include "Cutting edge fighter" , "sword" , "Calvalryman" .)