### Clue: Snack with traditional jam providers brought into school (8)
### Answer: SANDWICH 
 ### Explanation: Snack with traditional jam providers brought into school (8)
An envelope ('brought into') of AND ('with') plus WI (Women's Institute, 'traditional jam providers'. One of the original aims of Women's Institutes was to promote food production during the First World War)* in SCH ('school')*.