Shut in (4)
'shut in' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for pent that I've seen before include "Closely confined" , "enclosed" .)
'shut in' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for immured that I've seen before include "Imprisoned, shut in" , "Enclosed or imprisoned" , "Incarcerated, walled up" , "Incarcerated, put behind bars" , "Locked up in jail" .)