Red revolution's beginning in Newcastle? (7)
I believe the answer is:
scarlet
'red' is the definition.
(I know that scarlet is a type of red)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for scarlet that I've seen before include "Cartels (anag.)" , "Vivid red" , "bloody?" , "Cherry-red" , "Brilliant red colour" .)