Crossword Genius

What a cheque meant, as you'll have realised (4)

Ross

I believe the answer is:

cash

I'm a little stuck... Click here to teach me more about this clue!

'what a cheque meant' is the definition.
I can't judge whether this definition defines the answer.

'as you'll have realised' is the wordplay.
I cannot really see how this works, but
'as' is found in the answer.
The remaining letters 'ch' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for cash that I've seen before include ""Readies"" , "Funds" , "bread" , "Till" , "Hard currency" .)

I've seen this clue in the Evening Standard.
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