### Clue: Order for stone coffin someone from the West Midlands once executed (10)
### Answer: CISTERCIAN 
 ### Explanation: Definition: Order
 CIST(a stone-lined burial chamber) + "Mercian"(someone from the old kingdom of Mercia, which included the West Midlands of England) **minus its 1st letter**(executed;head cut off).
Defn: … of Christian monks and nuns.