Day set for renovating stable (6)

I believe the answer is:

steady

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'stable' is the definition.
(similar in meaning)

I don't understand the rest of the clue.

(Other definitions for steady that I've seen before include "Well-balanced" , "Calm and constant" , "Firm; regular" , "admirer" , "Not wobbling" .)

I've seen this clue in The Sun.

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