The getting_started page's Custom Location section gives the following example:

MANPATH_MAP /opt/infrastructure/clojure/bin /opt/infrastructure/clojure/man

Allowing for a different prefix that I gave the installer, the second location does not exist. I think the second location's "/man" should be "/share/man".

The long story is that, to avoid sudo, I could not follow the instructions precisely. Here's what I did to run into the problem and how I resolved it. I suppose that the resolution also applies to the sudo-related case illustrated on getting_started.

mkdir ${HOME}/opt
./linux-install-1.10.1.739.sh --prefix ${HOME}/opt/clojure

Instead of changing a man-related configuration in /etc, I added the following line to .bash_profile:

export MANPATH=":${HOME}/opt/clojure/bin:${HOME}/opt/clojure/man"

(Initial colon important to indicate that this is an addendum to system locations.) I activated the new MANPATH with source .bash_profile. But man -u clj did not yield any results.

After changing to

export MANPATH=":${HOME}/opt/clojure/bin:${HOME}/opt/clojure/share/man"

the man -u clj command worked.