This requires a PR to be accepted in lsp-mode before it can be used to add support for namespace cleaning:
(require 'lsp-clojure-hydra)
(global-set-key (kbd "C-c C-l") 'lsp-clojure-refactor-menu/body)Hitting C-c C-l will pop up a nice hydra with all the available refactorings at the moment.