Bias shown by the team (4)
I believe the answer is:
side
I believe this is a triple definition!
'bias' is the first definition.
(as in being one-sided)
'shown' is a link.
'by' is the second definition.
(synonyms)
'the team' is the third definition.
(both can mean a sports team)
(Other definitions for side that I've seen before include "Football team" , "Pretentious air" , "This effect is secondary" , "Spin given to a ball by striking it off-centre" , "TV channel" .)