A piece of the pie is a metaphor for having a SHARE in something. The crossword solutions for this term are PERCENT (7 letters), CRUST (5 letters), INGREDIENT (10 letters), SHARE (5 letters), SLICE (5 letters), and WEDGE (5 letters). Percent refers to the portion of the pie that one has, while CRUST is the outer layer of the pie. An INGREDIENT is a component of the pie, and SHARE is the amount of the pie that someone has. SLICE and WEDGE are two different ways of cutting the pie into portions.