Fencing contest (4)
I believe the answer is:
duel
'fencing contest' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for duel that I've seen before include "Prearranged engagement" , "Contest between two people, perhaps with weapons" , "Fight between two persons" , "Gentlemen's disagreement" , "honourable affair" .)