This comes of ignoring established customs (10)

I believe the answer is:

contraband

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'this comes of ignoring established customs' is the definition.
The definition suggests a singular noun which matches the answer.

This is the entire clue.

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(Other definitions for contraband that I've seen before include "Illegally brought in" , "loot" , "Smuggled goods" , "illegal trade" .)

I've seen this clue in The Globe and Mail.

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