Unprejudiced nature, remarkably liberal (7)
I believe the answer is:
neutral
'unprejudiced' is the definition.
(thesaurus)
'nature remarkably liberal' is the wordplay.
'remarkably' indicates an anagram.
'liberal' becomes 'l' (abbreviation).
'nature' anagrammed gives 'neutra'.
'neutra'+'l'='NEUTRAL'
(Other definitions for neutral that I've seen before include "Not favouring one side or the other" , "trying to keep out of the war" , "A runlet? (anag)" , "Supporting neither side" , "Renault (anag.)" .)