Crooked cop in station prevents you going (12)

I believe the answer is:

constipation

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'prevents you going' is the definition.
I can't judge whether this definition defines the answer.

'crooked cop in station' is the wordplay.
'crooked' is an anagram indicator (a crooked or disrupted version of the letters).
'cop'+'in'+'station'='copinstation'
'copinstation' anagrammed gives 'CONSTIPATION'.

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I've seen this clue in The Irish Times.

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