### Clue: Abandon vermouth? Don't be silly! (4,3,2)
### Answer: COME OFF IT 
 ### Explanation: Definition: Don't be silly
 [COME OFF](to abandon/to be off/to stop taking or accepting, as in "I've come off my heart medication") + IT(an informal term for Italian vermouth).
Defn: …/an expression telling one to stop talking or behaving foolishly.