Floors Rosy set out (7)

I believe the answer is:

storeys

'floors' is the definition.
(I know this)

'rosy set out' is the wordplay.
'out' is an anagram indicator (out can mean wrong or inaccurate).
'rosy'+'set'='rosyset'
'rosyset' is an anagram of 'STOREYS'.

(Other definitions for storeys that I've seen before include "Levels of a building" , "Floors, levels" .)

I've seen this clue in The Irish Independent.

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