The gang spotted a cutting implement (4-3)

I believe the answer is:

band-saw

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'a cutting implement' is the definition.
Both the definition and answer are singular nouns.
Perhaps there's a link between them I don't understand?

'the gang spotted' is the wordplay.
'the gang' becomes 'band' (I've seen this before).
'spotted' becomes 'saw' (I've seen this before).
'band'+'saw'='BAND-SAW'

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I've seen this clue in The Irish Independent.

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