Prickly shrub - or cocktail (6)

I believe the answer is:

mimosa

(Other definitions for mimosa that I've seen before include "Tropical shrub with yellow flowers" , "Tree with scented clustered flowers" , "So maim with tropical shrub bearing fragrant flowers" , "Flower of Maoism?" , "Sensitive tree or shrub with globular clusters of yellow flowers" .)

I've seen this clue in the Sydney Morning Herald.

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