### Clue: Adult locked up in Wakefield, missing green area once part of Yorkshire? (9)
### Answer: WAPENTAKE 
 ### Explanation: Definition: once part of Yorkshire?
**A**(dult) + **PENT** ("locked up") *in* **WAKE**(field) 
*A wapentake was a subdivision of certain English counties in the early pasrt of the second millennium.