Wiped clean (6)
I believe the answer is:
erased
'wiped clean' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for erased that I've seen before include "destroyed the lot" , "Rubbed out, deleted" , "Rubbed out, expunged" , "Red sea (anag)" , "deleted material" .)