One year in ghetto shelter (6)
I believe the answer is:
asylum
'shelter' is the definition.
(asylum is a kind of shelter)
'one year in ghetto' is the wordplay.
'one' becomes 'a' (a thing is one thing).
'year' becomes 'y'.
'in' is an insertion indicator.
'ghetto' becomes 'slum' (I've seen this in other clues).
'y' put into 'slum' is 'sylum'.
'a'+'sylum'='ASYLUM'
(Other definitions for asylum that I've seen before include "hostel" , "'Refuge, sanctuary (6)'" , "A shelter from danger or hardship" , "Institution for care of the insane" , "sought by immigrants" .)