Flower returned by personal assistant on phone (4)

I believe the answer is:

iris

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'flower' is the definition.
(iris is a type of flower)

I don't understand the rest of the clue.

(Other definitions for iris that I've seen before include "Part of the eye, usually brown or blue" , "may open up in camera" , "Fleur-de-lis" , "Pupil is at the centre of this" , "Flower and eye membrane" .)

I've seen this clue in The Irish Times.

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