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