Part of pyramid left unoccupied (4)

I believe the answer is:

idle

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

'part of pyramid left' is the wordplay.
'part of' says the answer is hidden in the clue.
'IDLE' is hidden in the letters of 'pyramid left'.

(Other definitions for idle that I've seen before include "Slothful" , "Reluctant to work - Pythonesque Eric" , "staying in bed all day?" , "Not in action or at work" , "Do very little" .)

I've seen this clue in The Independent.

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