The term 'Ancient Medium' can be broken down into two crossword solutions: ORACLE (6 letters) and Ancient (7 letters). An ORACLE is a person or agency considered to be a source of wise counsel or prophetic opinion. In ancient times, Oracles were often consulted for advice on important matters. Ancient refers to something that is very old, having existed for a long time. Therefore, Ancient Medium can be interpreted as an old source of wise counsel or prophetic opinion.