Play around hospital in a part of Germany (4)
I believe the answer is:
ruhr
'a part of germany' is the definition.
(I know that Ruhr is part of Germany)
'play around hospital in' is the wordplay.
'play around' becomes 'rur' (I am not sure about this - if you are sure you should believe this answer much more).
'hospital' becomes 'H' (abbreviation for hospital on maps).
'in' indicates putting letters inside.
'rur' enclosing 'h' is 'RUHR'.
Can you help me to learn more?
(Other definitions for ruhr that I've seen before include "German industrial region" , "Rhine tributary, coal district" , "Herman industrial area" , "Flower from Germany" , "Traditional region of German heavy industry" .)