Keep is restored, internally (5)
I believe the answer is:
store
'keep' is the definition.
(I know that keep is a more specific form of store)
'restored internally' is the wordplay.
'internally' says the answer is hidden in the clue.
'STORE' is hidden within 'restored'.
'is' is the link.
(Other definitions for store that I've seen before include "Shop; hoard" , "Save" , "Put away for future use" , "Eg, granite" , "Supermarket" .)