Greenfly, for instance, could be a danger to pets (6,4)

I believe the answer is:

garden pest

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'greenfly for instance' is the definition.
I can't tell whether this definition defines the answer.

'could be a danger to pets' is the wordplay.
'could be' indicates anagramming the letters.
'danger'+'pets'='dangerpets'
'dangerpets' anagrammed gives 'GARDEN PEST'.

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I've seen this clue in The Irish News.

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