Corrupt man met end in correction (9)
I believe the answer is:
amendment
'correction' is the definition.
(amendment is a kind of correction)
'corrupt man met end' is the wordplay.
'corrupt' indicates an anagram (a corrupted form).
'man'+'met'+'end'='manmetend'
'manmetend' is an anagram of 'AMENDMENT'.
'in' acts as a link.
(Other definitions for amendment that I've seen before include "Statement added to or revising a document" , "Corrective treatment" , "Addition or alteration, to a motion or official document, say" , "Alteration made in a formal document" , "A qualification" .)