A pastry's rolled layers (6)
I believe the answer is:
strata
'layers' is the definition.
(stratum is a kind of layer)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for strata that I've seen before include "Parallel layers" , "Layers of sedimentary rock" , "hard beds" , "Tiers of thicknesses" , "Levels, grades or social classes" .)