Gather mistakenly it’s something to chew (3,3)

I believe the answer is:

the rag

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'something to chew' is the definition.
I can't judge whether this definition defines the answer.

'gather mistakenly' is the wordplay.
'mistakenly' is an anagram indicator.
'gather' anagrammed gives 'THE RAG'.

'it's' is the link.

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I've seen this clue in the Evening Standard.

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