Return value from deflike macros is ignored

[zampino]

Reproduces with

(ns scratch.debug
  (:require [nextjournal.clerk :as clerk]))

(defmacro defmy [name body]
  `(do
     (def ~name ~body)
     (clerk/html [:h1.bg-green-200 "Defined: " [:span.font-mono.bg-slate-200 '~name]])))

(defmy stuff [1 2 3])

renders as

instead of

This is because the macro name starts with def and it defines exactly one var.