sure cure
Something that is guaranteed to be an effective remedy for some ailment. Typically implies a treatment that is either figurative, alternative, or homemade. Here, drink this—it's a sure cure for a hangover. Arts and crafts projects are a sure cure for bored kids.
sure cure
A remedy that won't fail, as in Hard work is a sure cure for brooding. Originating in the late 1800s as an advertising slogan ( Dr. Keck's Sure Cure for Catarrh; first recorded in 1881), this rhyming phrase was soon extended to other matters.