Biased, in a way (6)
I believe the answer is:
sexist
'biased in a way' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sexist that I've seen before include "discriminatory, in a way" , "Chauvinistic" , "Prejudiced against men or women" , "discriminating against women?" , "Discriminating, being hostile to gender" .)