Bump on a lid (4)
I believe the answer is:
stye
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bump on a lid</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for stye that I've seen before include "Animal pen" , "Eyelid sore" , "Inflamed swelling on the edge of an eyelid" , "dump" , "Climb" .)