Affliction of the eyelid (4)
I believe the answer is:
stye
'affliction of the eyelid' 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 "nasty spot" , "Eyelid sore" , "Infected swelling of the eye" , "It pains viewer" , "Animal pen" .)