Rebellious outsiders protested in the area in March (6)
I believe the answer is:
parade
'march' is the definition.
(I know that march can be written as parade)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for parade that I've seen before include "Public procession or ceremonial march" , "Air - display" , "Assembly of troops for inspection" , "Row of shops, march" , "Public procession as on St Patrick's Day" .)