Up north, temporarily plant peace tree of old (6)

I believe the answer is:

sheugh

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This might be a double definition.

'up north' is the first definition.
The definition suggests a singular noun which matches the answer.

'temporarily plant peace tree of old' is the second definition.
I can't tell whether this defines the answer.

Can you help me to learn more?

I've seen this clue in The Times and The Sunday Times.

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