Do a collie's work

HERD

Guide livestock like a skilled sheepdog might on the farm.

A collie is a type of herding dog, so "do a collie's work" directly hints at the action these dogs are known for—guiding and managing livestock. The answer "HERD" fits because it means to gather and move animals, which is exactly what a collie does. There’s no hidden wordplay here; it’s a straightforward definition clue pointing to the verb form of "herd."