Impartiality (11)
I believe the answer is:
disinterest
'impartiality' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for disinterest that I've seen before include "State of being impartial" , "Lack of personal motive, of bias" , "One's not getting involved with that" , "State of impartiality" , "Lack of involvement" .)