The term 'FIERY HEAP' can be broken down into two words, 'FIERY' and 'HEAP'. The word 'FIERY' is defined as something that is burning or glowing with intense heat or passion. The word 'HEAP' is defined as a large pile of something. Therefore, the term 'FIERY HEAP' can be interpreted as a large pile of burning or intensely hot material. The crossword solution for this term is 'PYRE', which is defined as a large pile of wood or other material that is set on fire as part of a ritual or ceremony.