From the outset, let oneself unwind 'neath giant elms, and relax (6)

I believe the answer is:

lounge

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

I don't understand the rest of the clue.

(Other definitions for lounge that I've seen before include "Parlour" , "Room for relaxing" , "Loll, sit about idly" , "Living area" , "Loll - sitting room" .)

I've seen this clue in The Irish Times.

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