Is aware of money going in fees (5)

I believe the answer is:

feels

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'is aware' is the definition.
I can't judge whether this definition defines the answer.

'money going in fees' is the wordplay.
'money' becomes 'l' (L can mean 'pounds').
'going in' indicates putting letters inside.
'l' put within 'fees' is 'FEELS'.

'of' acts as a link.

Can you help me to learn more?

(Another definition for feels that I've seen is " Is affected by".)

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