Inflamed swelling on eyelid (4)
I believe the answer is:
stye
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">inflamed swelling on eyelid</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for stye that I've seen before include "producing eyesore" , "swelling by organ" , "Climb" , "Ocular affliction" , "Eyelid affliction" .)