Largest fencing sword (4)
I believe the answer is:
epee
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">largest fencing sword</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 epee that I've seen before include "Fencing sword similar to a foil" , "Type of sword" , "Fighting blade" , "Duelling weapon" , "sharp-edged implement" .)