### Clue: Penny-pinching, vacuous young son goes back to pocket money (6)
### Answer: STINGY 
 ### Explanation: Definition: Penny-pinching
 **Reversal of**(… goes back) [ **inner letters deleted from**(vacuous) "young" + S(abbrev. for "son") ] **containing**(to pocket) TIN(slang for "money").