Plan to get shot of rose beds (6)
I believe the answer is:
strata
'beds' is the definition.
(I have seen 'hard beds' mean 'strata' so perhaps 'beds' could also mean 'strata')
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for strata that I've seen before include "bands" , "Tiers of thicknesses" , "Beds of sedimentary rock" , "Layers into which rocks are divided" , "Layers of rock on earth's surface" .)