... entirely different attitude over criminal father, after money (6,2,5)
I believe the answer is:
change of heart
'money' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.
'entirely different attitude over criminal father' is the wordplay.
'entirely different attitude' becomes 'change' (I can't explain this - if you can you should give a lot more credence to this answer).
'over' becomes 'o' (cricket abbreviation).
'criminal' indicates anagramming the letters.
'father' with letters rearranged gives 'fheart'.
'change'+'o'+'fheart'='CHANGE OF HEART'
'after' is the link.
Can you help me to learn more?
(Other definitions for change of heart that I've seen before include "rethink" , "Attitude alteration" , "Conversion (to kinder action?)" , "What Scrooge had" , "Profound alteration in outlook or opinion" .)