The term 'Troublesome Critters' is a colloquial phrase used to describe small animals that can cause damage or disruption to humans. The crossword solution for this term is 'Varmints, ' which is another word for these troublesome critters. Varmints are typically small animals such as rodents, rabbits, and other pests that can cause destruction to crops, property, and other items. They can also spread disease and cause other health issues.