Crocus kin (4)
I believe the answer is:
iris
'crocus kin' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for iris that I've seen before include "who keeps pupil in?" , "plant with showy flowers" , "Film about writer _______ Murdoch" , "Circular coloured membrane in the eye" , "--- Murdoch, author" .)