Impartiality, feature of blonde (8)
I believe the answer is:
fairness
'impartiality' is the definition.
(fairness is a kind of impartiality)
'feature of blonde' is the wordplay.
I cannot really see how this works, but
'blonde' could be 'fair' (similar in meaning) and 'fair' is located in the answer.
The remaining letters 'ness' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for fairness that I've seen before include "Beauty - justice" , "Equality" , "the fine, dry state of the weather" , "Impartiality, justice" , "Equity, justice" .)