One can blame corrupt bias (9)
I believe the answer is:
imbalance
'bias' is the definition.
(a bias is a lack of balance or equality)
'one can blame corrupt' is the wordplay.
'one' becomes 'I' (Roman numeral).
'corrupt' indicates an anagram.
'can'+'blame'='canblame'
'canblame' anagrammed gives 'mbalance'.
'i'+'mbalance'='IMBALANCE'
(Other definitions for imbalance that I've seen before include "Lack of proportion" , "Lopsidedness" , "lack of stability" , "Partiality" , "disproportion" .)