Money troubles? Not altogether (7)

I believe the answer is:

roubles

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

'money' is the definition.
(Russian money)

'troubles? not altogether' is the wordplay.
'ROUBLES' is hidden within the letters.
However, I'm uncertain how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for roubles that I've seen before include "Currency" , "Russian monetary units" , "Russian money" , "Moscow cash" .)

I've seen this clue in the Sydney Morning Herald.

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