Change in entirety, for all time (8)

I believe the answer is:

eternity

'all time' is the definition.

'change in entirety' is the wordplay.
'change in' indicates anagramming the letters.
'entirety' with letters rearranged gives 'ETERNITY'.

'for' is the link.

(Other definitions for eternity that I've seen before include "Evermore" , "An extremely long time" , "Endless time" , "Hereafter" , "Entirety (anag.)" .)

I've seen this clue in The Times.

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