Forgetful man's indebted for correction (6-6)
I believe the answer is:
absent-minded
'forgetful' is the definition.
(I've seen this before)
'man's indebted for correction' is the subsidiary indication.
'for correction' indicates anagramming the letters (I've seen this in other clues).
'mans'+'indebted'='mansindebted'
'mansindebted' is an anagram of 'absentminded'.
(Other definitions for absent-minded that I've seen before include "Wandering" , "Given to woolgathering" , "Vague and forgetful" , "Preoccupied U forgetful" , "Forgetful, inattentive" .)