Objective, detached (13)
I believe the answer is:
disinterested
I believe this clue is a double definition.
'objective' is the first definition.
(I've seen this before)
'detached' is the second definition.
(thesaurus)
(Other definitions for disinterested that I've seen before include "Impartial" , "Objective - uninvolved" , "Unbiased" , "Not expecting any profit" , "With no axe to grind" .)