/usr/share/doc/libclutter-gtk-1.0-dev/changelog.Debian.gz is in libclutter-gtk-1.0-dev 1.6.6-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libclutter-gtk-1.0-dev/../libclutter-gtk-1.0-0/changelog.Debian.gz