Trespassers assert charge to be out of order (12)

I believe the answer is:

gatecrashers

'trespassers' is the definition.
(gatecrasher is a kind of trespasser)

'assert charge to be out of order' is the wordplay.
'to be out of order' indicates an anagram.
'assert'+'charge'='assertcharge'
'assertcharge' with letters rearranged gives 'GATECRASHERS'.

I've seen this clue in The Times.

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