I would say Clojure more than substantial returns of invested time. Not just the language itself, but also the wider approach to software composition, feature accretion vs backward compatibility, schema'd dynamic typing seem benefictial no matter what your development tools you use. Maybe check out the talks below and see if they don't enRich you as software engineer.
https://www.youtube.com/watch?v=ROor6_NGIWU The Language of the System
https://www.youtube.com/watch?v=MCZ3YgeEUPg Design, Composition, and Performance
https://www.youtube.com/watch?v=oyLBGkS5ICk Spec-ulation
https://www.youtube.com/watch?v=YR5WdGrpoug Maybe Not