You could make it a systemd service or a timer: it’s not too difficult to do so.
Just keep in mind: this gets the contents of your clipboard:
qdbus org.kde.klipper /klipper org.kde.klipper.klipper.getClipboardContents
and this clears the clipboard:
qdbus org.kde.klipper /klipper org.kde.klipper.klipper.clearClipboardHistory
Just for “how to set up a systemd timer”.