Confusion when he gets a million at the end of the month (6)
I believe the answer is:
mayhem
'confusion' is the definition.
(I have seen 'Violent confusion' mean 'mayhem' so perhaps 'confusion' could also mean 'mayhem')
'he gets a million at the end of the month' is the wordplay.
'gets' is a charade indicator (letters next to each other).
'a million' becomes 'm' (abbreviation).
'at the end of' is a charade indicator (letters next to each other).
'the month' becomes 'may' (May is an example).
'he'+'m' is 'hem'.
'hem' put after 'may' is 'MAYHEM'.
'when' is the link.
(Other definitions for mayhem that I've seen before include "Carnage" , "Violent or damaging action, a crime" , "Total chaos" , "wilful infliction of injury" , "wild state" .)