Wrongly label item, with list in shambles (8)
I believe the answer is:
mistitle
'wrongly label item with list in shambles' is the definition.
I can't tell whether this definition defines the answer.
'item with list in shambles' is the wordplay.
'with' means one lot of letters go next to another.
'in shambles' indicates anagramming the letters (I've seen 'in shamble' mean this (I've seen this in other clues)).
'item' after 'list' is 'listitem'.
'listitem' is an anagram of 'MISTITLE'.
Can you help me to learn more?
(Another definition for mistitle that I've seen is " Wrongly name".)