Wipe, as a hard drive (5)
I believe the answer is:
erase
'wipe as a hard drive' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for erase that I've seen before include "Obliterate" , "Remove evidence of" , "Rub out, expunge" , "Blank out" , "Kill" .)