The term 'Job for Poirot' refers to the fictional detective Hercule Poirot, who is known for solving difficult cases. The crossword solutions for this term are 'CASE' (4 letters) and 'CAS' (3 letters). The word 'CASE' can refer to a legal dispute or a problem that needs to be solved, which is fitting for Poirot's job as a detective. The word 'CAS' is an abbreviation of the Latin phrase 'causa sine qua non, ' which translates to 'cause without which not, ' and is used to describe something that is essential to a particular situation. Both words accurately describe Poirot's job as a detective, as he is often called upon to solve difficult cases and identify the essential elements of a crime.