### Clue: Purgative for use when badly cooked roast contributes to wind (6,3)
### Answer: CASTOR OIL 
 ### Explanation: Definition: Purgative
 **Anagram of**(badly cooked) ROAST **contained in**(contributes to) COIL(to wind in spirals). A WIWD (wordplay intertwined with definition) clue.