Opposing proposal for movement in the shop? (13)

I believe the answer is:

countermotion

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'movement in the shop?' is the definition.
The definition suggests a singular noun which matches the answer.

'opposing proposal' is the wordplay.
'opposing' becomes 'counter' (I've seen this before).
'proposal' becomes 'motion' (proposal at a meeting).
'counter'+'motion'='COUNTERMOTION'

'for' is the link.

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I've seen this clue in The Irish News.

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