Organ with an iris (3)
I believe the answer is:
eye
(Other definitions for eye that I've seen before include "Twenty four ac emphasises it" , "Ireland's . . ., off the Dublin coast" , "Middle of storm" , "Optic organ" , "Organ of sight" .)
I believe the answer is:
eye
(Other definitions for eye that I've seen before include "Twenty four ac emphasises it" , "Ireland's . . ., off the Dublin coast" , "Middle of storm" , "Optic organ" , "Organ of sight" .)