They cause mischief and disturb manufacturers (13)

I believe the answer is:

troublemakers

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'they cause mischief' is the definition.
The definition suggests an adverb but the answer is not.

'disturb manufacturers' is the wordplay.
'disturb' becomes 'trouble' (troubling is a kind of disturbing).
'manufacturers' becomes 'makers' ('maker' can be a synonym of 'manufacturer').
'trouble'+'makers'='TROUBLEMAKERS'

'and' is the link.

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I've seen this clue in The Irish News.

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