Moans with blemish turning into utter mess (12)
I believe the answer is:
omnishambles
'utter mess' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.
'moans with blemish turning' is the wordplay.
'with' means one lot of letters go next to another.
'turning' is an anagram indicator.
'moans'+'blemish'='moansblemish'
'moansblemish' anagrammed gives 'OMNISHAMBLES'.
'into' acts as a link.
Can you help me to learn more?
(Other definitions for omnishambles that I've seen before include "policy disaster" , "State of total confusion" , "Riot in Westminster" .)