Protests against things (7)
I believe the answer is:
objects
This clue might be a double definition.
'protests' is the first definition.
(I've seen this in another clue)
'things' is the second definition.
(I know this)
'against' is the link.
I am not very happy about this link. It may belong to one of the definitions.
Can you help me to learn more?
(Other definitions for objects that I've seen before include "Takes exception to the things?" , "Material things" , "Expresses opposition" , "Articles; aims" , "Opposes" .)