Protest against goal (6)
I believe the answer is:
object
I believe this is a double definition.
'protest against' is the first definition.
(thesaurus)
'goal' is the second definition.
(object is a kind of goal)
(Other definitions for object that I've seen before include "Tangible thing" , "Thing or target" , "Don't agree" , "Express opposition; goal" , "Make protest, disagree" .)