Skin growth (4)
I believe the answer is:
wart
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">skin growth</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 wart that I've seen before include "Abnormal blemish on the skin, caused by a virus" , "Verruca" , "Horny skin growth" , "Small hard excrescence on the skin" , "Small rounded protuberance on the skin" .)