Broad knife (7)
I believe the answer is:
machete
'broad knife' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for machete that I've seen before include "Broad heavy knife used in S American jungles" , "Broad heavy knife common in Central America" , "A heavy-duty jungle knife" , "The mace (anag.)" , "Broad heavy knife used in S America" .)