The term 'Ancient Mystic' can be broken down into two crossword solutions: 'ESSENE' and '6 letters'. The Essenes were a Jewish sect that existed from the 2nd century BC to the 1st century AD. They were known for their ascetic lifestyle, communal living, and mystical beliefs. They were also known for their reverence for the Torah and their commitment to the Law of Moses. The term '6 letters' refers to the length of the word 'ESSENE', which is six letters long.