Messed-up girl shouted at male, possibly over ninety (10)

'messed-up' is the definition.

'girl shouted at male possibly over ninety' is the wordplay.
'girl' becomes 'miss' (I've seen this before).
'shouted' shows a homophone (sound like) (how the word might sound if shouted).
'at male' becomes 'man' (I am not sure about this - if you are sure you should believe this answer much more).
'possibly over ninety' becomes 'aged'.
'miss' is a homophone of 'mis'.
'mis'+'man'+'aged'='MISMANAGED'