Eldoc
CIDER provides support for Emacs Eldoc minor mode. Eldoc dynamically displays the function signature as source code is being edited.
Configuring Eldoc
To enable Eldoc for CIDER, add the following to your init.el:
;; Enable Eldoc in CIDER Mode buffers:
(add-hook 'cider-mode-hook #'eldoc-mode)
(add-hook 'cider-repl-mode-hook #'eldoc-mode)