Obliterated (10)
(Other definitions for eradicated that I've seen before include "Completely destroyed" , "annihilated" , "Completely removed" , "Wiped out" , "Completely eliminated" .)
'obliterated' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for erased that I've seen before include "Removed by rubbing" , "'Wiped out, deleted (6)'" , "Removed completely" , "Rubbed out, deleted" , "destroyed the lot" .)