Give short change - it's a mistake of sorts (9)
I believe the answer is:
oversight
'a mistake of sorts' is the definition.
I can't tell whether this defines the answer.
'give short change' is the wordplay.
'change' indicates anagramming the letters.
'give'+'short'='giveshort'
'giveshort' is an anagram of 'OVERSIGHT'.
'it's' acts as a link.
Can you help me to learn more?
(Other definitions for oversight that I've seen before include "Failure to notice something" , "act of negligence" , "what supervisor has" , "Got shiver due to forgetfulness" , "Failure to notice - blunder" .)