### Clue: Ridicule resolution to replace Conservative by monarch (8)
### Answer: DERISION 
 ### Explanation: Definition: Ridicule
 "decision"(resolution/a decisive end to a pending issue, say) **with** "c"(abbrev. for a member of the Conservative Party) **replaced by**(to replace … by) R(abbrev. for "Rex" or "Regina"/king or queen respectively/a monarch).