Pale protestor (6)
I believe the answer is:
picket
I believe this clue is a double definition.
'pale' is the first definition.
('picket' can be a synonym of 'pale')
'protestor' is the second definition.
(someone on a picket line)
(Other definitions for picket that I've seen before include "Strikers' blockade" , "Group protecting strikers" , "Kind of fence or striking workers" , "Strike line; stake" , "Protest outside place of work" .)