Broad heavy knife (7)
I believe the answer is:
machete
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">broad heavy knife</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 machete that I've seen before include "Knife for hacking" , "Jungle blade" , "cutter" , "Broad heavy knife used in S American jungles" , "Cheat me over broad heavy knife used in jungle" .)