dissoc

(dissoc hmap key)

(ns clojure.examples.example
   (:gen-class))
(defn example []
   (def demokeys (hash-map "z" "1" "b" "2" "a" "3"))
   (println (dissoc demokeys "b")))
(example)

{z 1, a 3}

• https://www.tutorialspoint.com/clojure/clojure_maps_dissoc.htm