It's understood rebellious municipality won't be using yuan (8)
I believe the answer is:
implicit
'it's understood' is the definition.
(similar in meaning)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for implicit that I've seen before include "Assumed, not spelled out" , "Inherent but not made clear" , "Understood, tacit" , "Not actually stated" , "present, but not visible" .)