The term 'knight clothes' refers to the clothing worn by knights during the Middle Ages. The two crossword solutions for this term are 'ARMOR' (5 letters) and 'MAIL' (4 letters). ARMOR was a type of protective clothing made from metal or leather that was worn by knights to protect them in battle. MAIL was a type of ARMOR made from interlocking metal rings that was worn over the top of other clothing for extra protection.