The `@atomist/sdm-pack-clojure` is an Atomist extension pack that provides automated creation, building, and delivery of Spring and Spring Boot applications. It adds Clojure support to an Atomist Software Delivery Machine, enabling features like building with Leiningen, running cljformat, managing versions, building Docker images, and deploying JARs. This tool is designed for developers using Clojure and Atomist's SDM platform to streamline their software delivery pipeline.