Restarting cron after crontab update

[Roger Price]

With emacs I made a change to /etc/crontab on a Debian 11 workstation.  I have 
done this before successfully.  After the change I ran

 systemctl restart cron && systemctl status cron
But now the change doesn't take effect.

I tried systemctl reload cron, but got the reply "Failed to reload cron.service: 
Job type reload is not applicable for unit cron.service".

What is the correct way to get cron to read the new crontab ?

Thanks, Roger