The coercion's over, in short (3)

I believe the answer is:

oer

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'short' is the definition.
Both the answer and definition are adverbs. Maybe there's a link between them I don't understand?

'the coercion's over in' is the wordplay.
'in' indicates the answer is hidden within the clue.
'OER' is hidden within 'coercions over'.

Can you help me to learn more?

(Another definition for oer that I've seen is " Above (poetic)".)

I've seen this clue in the Evening Standard.

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