The term 'One Holding All The Cards' can be summarized as a person who is in control of a situation. This phrase is often used to describe someone who has the upper hand in a negotiation or dispute. The crossword solution for this term is 'WALLET, ' which is a small, flat case used to carry money and other small items. A WALLET can also be seen as a metaphor for power and control, as it holds all of one's possessions.