/usr/lib/x86_64-linux-gnu/libclutter-gst-1.0.so is in libclutter-gst-dev 1.6.0-2build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libclutter-gst-1.0.so.0.600.0
/usr/lib/x86_64-linux-gnu/libclutter-gst-1.0.so.0.600.0