Stinging plant we should grasp? (6)

I believe the answer is:

nettle

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'stinging plant' is the definition.
(I've seen this before)

I don't understand the remainder of the clue.

(Other definitions for nettle that I've seen before include "sample of herbal tea?" , "Upset" , "Plant to irritate" , "urticaceous plant" , "Plant with stinging hairs" .)

I've seen this clue in The Sun.

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