Unfinished language of Greek goddess (4)

I believe the answer is:

iris

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'greek goddess' is the definition.
(I've seen this in another clue)

I don't understand the rest of the clue.

(Other definitions for iris that I've seen before include "A flower; spirit conjured in Tempest" , "plant with showy flowers" , "Fleur-de-lis" , "Woman" , "Bright flower or eye part" .)

I've seen this clue in The Irish Times.

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