Why would you want to do a clinical intership after your graduation?
In most cases, the students who opt to do a clinical internship after their graduation, do this to obtain the BAPD and the LOGO GZ-certificate. But even on it's own, having clinical experience in a real world setting is a favorable addition to your CV. Finishing your internship this way is very rewarding, but can be an intense and complex endevour.
Contact your specialisation coordinator for more information about this option.
See also
UM website: non-degree seeking students