The term 'MINOR MISSION' can be broken down into two words: 'MINOR' and 'MISSION'. The word 'MINOR' is defined as something of lesser importance or significance, while the word 'MISSION' is defined as a task or job that needs to be completed. The crossword solution for this term is 'ERRAND', which is defined as a short journey taken to accomplish a specific task. An ERRAND is usually a MINOR MISSION, as it is a task that needs to be completed quickly and efficiently.