File for individual held by person sleeping rough (7)
I believe the answer is:
dossier
'file' is the definition.
(thesaurus)
'individual held by person sleeping rough' is the wordplay.
'individual' becomes 'i'.
'held by' means one lot of letters goes inside another.
'person sleeping rough' becomes 'dosser'.
'i' inserted inside 'dosser' is 'DOSSIER'.
'for' acts as a link.
(Other definitions for dossier that I've seen before include "Collection of documents on a topic" , "File on a person or topic" , "A collection of papers" , "Papers containing detailed information about someone" , "Papers containing detailed information about a particular person" .)