Sharp-pointed duelling sword (4)
I believe the answer is:
epee
'sharp-pointed duelling sword' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for epee that I've seen before include "Narrow fencing sword" , "Thin fencing sword" , "Sharp-pointed duelling sword" , "Foil for riposte" , "Fencing weapon" .)