'Red Sea' erroneously deleted (6)
I believe the answer is:
erased
'deleted' is the definition.
('erase' can be a synonym of 'delete')
'red sea erroneously' is the wordplay.
'erroneously' indicates anagramming the letters.
'red'+'sea'='redsea'
'redsea' anagrammed gives 'ERASED'.
(Other definitions for erased that I've seen before include "destroyed the lot" , "Rubbed out, deleted" , "Obliterated" , "'Wiped out, deleted (6)'" , "deleted material" .)