Tumour (8)
I believe the answer is:
neoplasm
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tumour</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that tumour can be written as neoplasm)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for neoplasm that I've seen before include "Man lopes into a tumour" , "Morbid new growth" , "nasty new growth" , "To find tumour" .)