Continue providing subsistence (4)
I believe the answer is:
keep
I believe this is a double definition.
'continue' is the first definition.
(keeping is a kind of continuing)
'subsistence' is the second definition.
(thesaurus)
'providing' is the link.
(Other definitions for keep that I've seen before include "Only one cricketer on field will" , "Subsistence" , "Retain, maintain" , "Board and lodgings, perhaps" , "Living" .)