Starts decommissioning temporary housing with the final easing of tensions (7)

I believe the answer is:

detente

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'easing of tensions' is the definition.
(I've seen this in another clue)

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(Other definitions for detente that I've seen before include "Relaxed relations" , "Thaw in relations" , "Improvement of political relations" , "Easing of strained relationships between countries" , "relaxation" .)

I've seen this clue in the Sydney Morning Herald.

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