Disturbance in part of hospital stopped by police (8)
I believe the answer is:
incident
'disturbance' is the definition.
(I know that incident is a type of disturbance)
'in part of hospital stopped by police' is the wordplay.
'part of hospital' becomes 'ent' (abbreviation for Ear, Nose and Throat department).
'stopped by' means one lot of letters goes inside another (I've seen this in other clues).
'police' becomes 'CID' (abbreviation for Criminal Investigation Department).
'in'+'ent'='inent'
'inent' going around 'cid' is 'INCIDENT'.
(Other definitions for incident that I've seen before include "Minor event or occurrence" , "Mishap - occurrence" , "Cited inn as source of happening" , "Confrontation" , "Episode" .)