Ridicule resolution to replace Conservative by monarch (8)
I believe the answer is:
derision
'ridicule' is the definition.
(I know that ridicule can be written as derision)
'resolution to replace conservative by monarch' is the wordplay.
I cannot quite see how this works, but
'monarch' could be 'er' (abbreviation for Elizabeth Regina, British Queen) and 'er' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for derision that I've seen before include "Contemptuous ridicule" , "Mockery, ridicule" , "Ironside (anag) - mockery" , "'Ridicule, contempt (8)'" , "Contemptuous mockery" .)