Thus they went out of turn with a poet (7)

I believe the answer is:

southey

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'went out of turn with a poet' is the definition.
I can't judge whether this definition defines the answer.

'thus they' is the wordplay.
'thus' becomes 'sou' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'sou'+'they'='SOUTHEY'

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I've seen this clue in the Evening Standard.

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