1) Athlete using a sword 2) Athos, at times 3) Battler 4) Belligerent 5) Certain Summer Olympian 6) Combatant 7) Combatant with a saber 8) Dueling party 9) Duelist 10) Epee artist 11) Fighter 12) Foil user 13) Foil waver 14) Hamlet, near the end 15) He has a duel role 16) Modern pentathlete, at times Found on https://www.crosswordclues.com/clue/fencer
Fen'cer noun One who fences; one who teaches or practices the art of fencing with sword or foil. « As blunt as the fencer's foils.» Shak. Found on http://www.encyclo.co.uk/webster/F/18