Big toe swelling (6)
I believe the answer is:
bunion
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">big toe swelling</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for bunion that I've seen before include "Swelling on the foot" , "Foot fault" , "Swelling at base of toe with thickened skin" , "Painful swelling of the big toe joint" , "Painful swelling at base of big toe" .)