Malcontent mean or misguided (6)
I believe the answer is:
moaner
'malcontent' is the definition.
(I've seen this in another clue)
'mean or misguided' is the wordplay.
'misguided' indicates an anagram (letters guided into the wrong places).
'mean'+'or'='meanor'
'meanor' anagrammed gives 'MOANER'.
(Other definitions for moaner that I've seen before include "Grumbler" , "Complainer" , "One who complains" , "Grouch" .)