/usr/share/doc/libclutter-1.0-doc/html-cally is in libclutter-1.0-doc 1.24.2-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libclutter-1.0-doc/../../gtk-doc/html/cally
/usr/share/doc/libclutter-1.0-doc/../../gtk-doc/html/cally