Crossword Genius

Old, major player in financial services circles (4)

Ross

I believe the answer is:

orbs

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'circles' is the definition.
(I've seen this before)

'old major player in financial services' is the wordplay.
'old' becomes 'o' (abbreviation).
'major player in financial services' becomes 'rbs' (I can't explain this - if you can you should give a lot more credence to this answer).
'o'+'rbs'='ORBS'

Can you help me to learn more?

(Other definitions for orbs that I've seen before include "sight" , "Ball shapes" , "They symbolise the power of kings" , "Lovely eyes, bros" , "Eyeballs" .)

I've seen this clue in The Times.
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