The term 'Roadrunner Feature' is a reference to the popular cartoon character, Roadrunner. The Roadrunner is a fast-running bird that is constantly chased by its nemesis, Wile E. Coyote. The Roadrunner Feature is a feature of the Roadrunner cartoon series in which the Roadrunner outsmarts the Coyote in some way. The crossword solution for this term is 'CREST', which refers to the CREST of feathers on the Roadrunner's head.