I don't know about Cassandra, but I'm pretty sure that TensorFlow as it is does not have any need for Clojure, nor am I aware that they use it, at least not in any substantial way. Maybe someone added some wrapper around their Java support (which was half-assed back in the day, but that was many years ago), but I'd be surprised if that was part of the main project. Quick google search did not yield any results, FWIW.
I don't know about Cassandra, but I'm pretty sure that TensorFlow as it is does not have any need for Clojure, nor am I aware that they use it, at least not in any substantial way. Maybe someone added some wrapper around their Java support (which was half-assed back in the day, but that was many years ago), but I'd be surprised if that was part of the main project. Quick google search did not yield any results, FWIW.