God sleeps on (or kips inside) in retirement (6)

I believe the answer is:

kronos

'god' is the definition.
(Greek god)

'sleeps on or kips inside in retirement' is the wordplay.
'inside' indicates the answer is hidden within the clue.
'in retirement' says the letters should be written backwards (retire can mean to go back or backwards).
'sonork' is hidden within 'sleeps on or kips'.
'sonork' backwards is 'KRONOS'.

(Another definition for kronos that I've seen is " Titan".)

I've seen this clue in The Guardian.

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