The term 'Dirty Group' can be solved by the crossword solution 'DOZEN'. The word 'DOZEN' is a noun that refers to a group of twelve items. It is commonly used to refer to a group of twelve people or things, such as a DOZEN eggs or a DOZEN roses. It is also used to refer to a group of twelve people who are working together on a project or task. In this context, the term 'Dirty Group' could refer to a group of twelve people who are working together to complete a task that is considered to be dirty or unpleasant.