Rest in peace as everlasting (4)

I believe the answer is:

ease

'rest' is the definition.
('ease' can be a synonym of 'rest')

'in peace as everlasting' is the wordplay.
'in' says the answer is hidden in the clue.
'EASE' is hidden within 'peace as everlasting'.

(Other definitions for ease that I've seen before include "soldier may be at it" , "Make comfortable" , "Lack of difficulty" , "Poise or leisure" , "Alleviate" .)

I've seen this clue in The Independent, The Times and The Sun.

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