Adversarial in law, a coal car suit, collapsed (12)

I believe the answer is:

accusatorial

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'adversarial in law a coal car suit collapsed' is the definition.
I can't tell whether this defines the answer.

'a coal car suit collapsed' is the wordplay.
'collapsed' indicates an anagram.
'coal'+'car'+'suit'='coalcarsuit'
'coalcarsuit' anagrammed gives 'ccusatorial'.
'a'+'ccusatorial'='ACCUSATORIAL'

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I've seen this clue in the Sydney Morning Herald.

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