### Clue: Lose your rag as rubbish son needs to get up (4)
### Answer: SNAP 
 ### Explanation: Definition: Lose your rag
 **Reversal of**(… needs to get up, in a down clue) [PAN(to rubbish/to criticise severely) + S(abbrev. for "son")].
Defn: …/temper/cool.