Trouble from injury containing clot on hospital department (10)
I believe the answer is:
harassment
'trouble' is the definition.
(thesaurus)
'injury containing clot on hospital department' is the wordplay.
'injury' becomes 'harm' ('harm' can be a synonym of 'injury'**).
'containing' means one lot of letters goes inside another.
'clot' becomes 'ass' (I've seen this before).
'on' says to put letters next to each other.
'hospital department' becomes 'ent'.
'harm' going around 'ass' is 'harassm'.
'harassm'+'ent'='HARASSMENT'
'from' acts as a link.
(Other definitions for harassment that I've seen before include "Means trash (anag.)" , "Persecution" , "Constant intimidation" , "trouble?" , "Perhaps stalking" .)