Epéeist's move (5)
I believe the answer is:
lunge
'epeeist's move' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for lunge that I've seen before include "Impulsive move" , "Sudden push forward" , "Sudden forward movement" , "Thrust forward as with sword" , "Stab" .)