Woman something of a looker (4)

I believe the answer is:

iris

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'woman' is the definition.
(woman's name)

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

(Other definitions for iris that I've seen before include "Flower - rainbow" , "Camera diaphragm" , "Female" , "Eye part or pretty flower" , "Flag - surrounding pupil" .)

I've seen this clue in The Sun.

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