He was trained in arms and chivalry in olden days (6)
I believe the answer is:
knight
'he was trained in arms and chivalry in olden days' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for knight that I've seen before include "Male honoured by the British sovereign" , "horse in game!" , "Honour" , "He was trained in arms and chivalry in olden days" , "Chesspiece which moves in the shape of an L" .)