Gangster’s girl wanting some more money (4)
I believe the answer is:
Here is my best explanation:
'gangster's girl' is the definition.
(I've seen this before)
'some more money' is the wordplay.
'some more' becomes 'mol' (I can't justify this - if you can you should give a lot more credence to this answer).
'money' becomes 'l' (L can mean 'pounds').
'wanting' acts as a link.
Can you help me to learn more?