New hospital - rats all over the place, no real punishment (1,4,2,3,5)
I believe the answer is:
a slap on the wrist
'no real punishment' is the definition.
(a slap on the wrist is a light punishment)
'new hospital rats all over the place' is the wordplay.
'all over the place' is an anagram indicator.
'new'+'hospital'+'rats'='newhospitalrats'
'newhospitalrats' anagrammed gives 'A SLAP ON THE WRIST'.
(Other definitions for a slap on the wrist that I've seen before include "Some stick" , "reprimand" .)