Give short change in error (9)
I believe the answer is:
oversight
'error' is the definition.
(oversight is a kind of error)
'give short change' is the wordplay.
'change' is an anagram indicator.
'give'+'short'='giveshort'
'giveshort' anagrammed gives 'OVERSIGHT'.
'in' is the link.
(Other definitions for oversight that I've seen before include "Shot giver due to unintentional omission" , "Failure to notice something" , "Slip-up" , "Carelessness" , "Supervision - omission" .)