Howler has been corrected (7)
I believe the answer is:
banshee
'howler' is the definition.
(I've seen this before)
'has been corrected' is the wordplay.
'corrected' indicates anagramming the letters.
'has'+'been'='hasbeen'
'hasbeen' is an anagram of 'BANSHEE'.
(Other definitions for banshee that I've seen before include "Wailing spirit of Irish folklore" , "Gaelic spirit" , "She predicts death in Ireland" , "Death-portending spirit" , "Howler" .)