Return envelope ready for posting and journalist is relaxed (5)

I believe the answer is:

eased

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'is relaxed' is the definition.
(I've seen this before)

I don't understand how the remainder of the clue works.

(Other definitions for eased that I've seen before include "Helped" , "Lessened, pain or discomfort, say" , "Made less stressful or difficult" , "Given relief" , "Released pressure" .)

I've seen this clue in The Independent.

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