Crossword Genius

I've been stupid about beginning to save money (4)

Ross

I believe the answer is:

dosh

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

'money' is the definition.
(slang term)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for dosh that I've seen before include "currency" , "Ready" , "Money (sl.)" , "cash" , "Bread - gravy - dough" .)

I've seen this clue in The Guardian.
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