Backed up? However if I edit that will show (8)
I believe the answer is:
verified
'backed up?' is the definition.
'however if i edit that will show' is the wordplay.
'that will show' indicates the answer is hidden within the clue.
'VERIFIED' is hidden within 'however if i edit'.
(Other definitions for verified that I've seen before include "Ascertained the truth of (something)" , "Confirmed the accuracy" , "Established as true" , "Shown to be true" .)