Chevalier (6)
I believe the answer is:
knight
'chevalier' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for knight that I've seen before include "Heroic champion" , "Man on board" , "Male honoured by the British sovereign" , "Chivalrous warrior of olden times" , "Give title to; chess piece" .)