Biased person (5)
I believe the answer is:
bigot
'biased person' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for bigot that I've seen before include "sectarian" , "Intolerantly prejudiced person" , "Intolerant type" , "Deeply prejudiced and intolerant person" , "Dogmatist" .)