/usr/share/applications/dclock.desktop is in dclock 2.2.2-9.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | [Desktop Entry]
Name=DClock
Comment=A configurable digital clock
Exec=dclock
Icon=dclock
Type=Application
Categories=Utility;Clock;
Keywords=time;display;
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