The term 'lengthy account' can be described by two crossword solutions: 'SAGA' and 'LITANY'. A SAGA is a long, narrative story that is usually based on historical events. It is often associated with Norse and Icelandic literature, but can also refer to any long, detailed story. A LITANY is a type of prayer or supplication that is made up of a series of invocations and responses. It is typically used in religious ceremonies and is characterized by its repetitive structure.