Eyelid irritation (4)
I believe the answer is:
stye
'eyelid irritation' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for stye that I've seen before include "Viewer's complaint" , "Eye blemish" , "makes viewer sore" , "Eye complaint" , "Eyelid sore" .)