I am incomplete and neutral (9)
I believe the answer is:
impartial
'neutral' is the definition.
(thesaurus)
'i am incomplete' is the wordplay.
'i am' becomes 'I'm' (contraction).
'incomplete' becomes 'partial' (similar in meaning).
'im'+'partial'='IMPARTIAL'
'and' is the link.
(Other definitions for impartial that I've seen before include "Fair, unprejudiced" , "Showing lack of favouritism" , "not taking sides" , "Objective" , "Treating all rivals equally" .)