Aclock is a another clock program, but this time it's an analog clock.
To compile it on Termux you'll need to downloaded the source.
wget http://www.tenox.net/out/aclock/aclock-unix-curses.c
You'll also need the ncurses-dev
package.
apt install ncurses-dev
Now you simply have to compile it.
gcc aclock-unix-curses.c -o aclock -lncurses -lm
After that you can simply run it with ./aclock
.