Protest against the article (6)
I believe the answer is:
object
I believe this clue is a double definition.
'protest against' is the first definition.
(thesaurus)
'the article' is the second definition.
(both can mean a thing or item)
(Other definitions for object that I've seen before include "Voice disapproval; goal" , "Make protest, disagree" , "Tangible thing" , "Something that can be seen and touched" , "Express dissent, protest" .)