Sword fight (4)
I believe the answer is:
duel
'sword fight' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for duel that I've seen before include "Combat between two people in matter of honour" , "Fight to the death between two people" , "Combat to settle a row" , "Contest between two people, perhaps with weapons" , "Two-person combat" .)