Filch, steal (7)
I believe the answer is:
purloin
I believe this clue is a double definition.
'filch' is the first definition.
(I know that filch can be written as purloin)
'steal' is the second definition.
(I know that purloin is a more specific form of the action steal)
(Other definitions for purloin that I've seen before include "Make off with" , "'Nick, pilfer (7)'" , "appropriate" , "Swipe" , "'Nick, filch (7)'" .)