Strata (6)
'strata' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for layers that I've seen before include "egg producers" , "bands" , "fowl?" , "Strata - hens" , "Thicknesses of material - or hens?" .)
'strata' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for tiers that I've seen before include "Layers of rites" , "Rows; levels" , "Row upon row" , "More than one bank" , "Rows; ranks" .)