Mankiest bananas emerging through error of judgement (8)
I believe the answer is:
mistaken
'error of judgement' is the definition.
'mistaken' can be an answer for 'error' (thesaurus). I am unsure of the 'of judgement' bit.
'mankiest bananas emerging' is the wordplay.
'mankiest' can be anagrammed to 'MISTAKEN'.
Though, I am not clear how the anagram is indicated.
'through' acts as a link.
Can you help me to learn more?
(Other definitions for mistaken that I've seen before include "'Wrong, misguided (8)'" , "Wrong, incorrect" , "Erroneous" , "Wrong-headed" , "Wrong in opinion, judgment etc." .)