The term 'DASTARDLY Fellows' can be broken down into two words: 'DASTARDLY' and 'Fellows'. The word 'DASTARDLY' is an adjective meaning 'evil or wicked', while the word 'Fellows' is a noun meaning 'a group of people who share a common purpose or interest'. The crossword solution for this term is 'KNAVES', which is a noun meaning 'a dishonest or unscrupulous person'. Therefore, the term 'DASTARDLY Fellows' can be used to describe a group of people who are dishonest and wicked.