Treats served with clotted cream (6)
I believe the answer is:
scones
(Other definitions for scones that I've seen before include "Small cakes made with flour, fat and milk" , "Small plain cakes" , "Small unsweetened or lightly sweetened cakes" , "Small soft cakes of flour, fat and milk - eaten buttered" , "Small cakes of flour and fat, usually buttered" .)