Amphitheater levels (5)
I believe the answer is:
tiers
'amphitheater levels' 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 "Binders" , "Rows; levels" , "Row upon row" , "Layers or thicknesses" , "Layers, strata" .)