A girl I’d take some risks for (4)

I believe the answer is:

iris

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'a girl' is the definition.

I don't understand how the remainder of the clue works.

(Other definitions for iris that I've seen before include "Eye diaphragm" , "- - Murdoch, novelist" , "Flowers in the eye?" , "Pupil's place?" , "plant with showy flowers" .)

I've seen this clue in the Evening Standard.

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