Bill put in stir, perhaps, being a bigot (6)
I believe the answer is:
racist
'a bigot' is the definition.
(racist is a kind of bigot)
'bill put in stir perhaps' is the wordplay.
'bill' becomes 'ac'.
'put in' is an insertion indicator.
'perhaps' indicates anagramming the letters.
'stir' anagrammed gives 'rist'.
'ac' inserted within 'rist' is 'RACIST'.
'being' acts as a link.
(Other definitions for racist that I've seen before include "Person prejudiced against others for ethnic reasons" , "One prejudiced against people of other nationalities" , "Hostile towards people of other ethnic origins" , "One ethnically biased" , "Scar it (anag)" .)