Revolution in each canton? That won't happen! (3,1,6)
I believe the answer is:
not a chance
'that won't happen' is the definition.
(I've seen this before)
'revolution in each canton?' is the wordplay.
'each canton' anagrams to 'NOT A CHANCE'.
Though, I am not clear how the anagram is indicated.
Can you help me to learn more?
(Other definitions for not a chance that I've seen before include "That won't happen" , "on your bike?" .)