Crossword Genius

Irritate at the plant (6)

Ross

I believe the answer is:

nettle

I'm a little stuck... Click here to teach me more about this clue!

'irritate' is the definition.
(I know that irritate can be written as nettle)

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for nettle that I've seen before include "Grasp it firmly and it will not sting" , "Provoke" , "Upset" , "Annoy; common weed" , "Sting or annoy with the plant" .)

I've seen this clue in The Mirror.
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