Small plant-sucking insect (5)

I believe the answer is:

aphid

'small plant-sucking insect' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for aphid that I've seen before include "Greenfly etc" , "Plant-louse" , "Plant louse" , "Garden pest" , "insect pest" .)

I've seen this clue in The Irish Times and The Guardian.

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