The term 'Trident Piece' is a crossword solution for the clue 'WINTER' (6 letters). It is derived from the three-pronged spear, known as a trident, which is often associated with the Greek god Poseidon, who was the god of the sea and WINTER storms. The trident is also a symbol of power and authority, and is often used to represent strength and stability. In this context, the term 'Trident Piece' can be interpreted as a metaphor for the strength and stability of WINTER.