### Clue: For instance, certainly not turning over what should be cooled before serving? (7)
### Answer: REVENGE 
 ### Explanation: Definition: what should be cooled before serving
 **Reversal of**(… turning over, in a down clue) [EG(abbrev. for "exempli gratia"/for instance/for example) + NEVER!(certainly not!/not ever)].
Defn: What is best served cold, as the saying goes.