Crossword Genius

With sovereign to invest, finding banking system (9)

Ross

I believe the answer is:

terracing

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

'banking system' is the definition.

'with sovereign to invest' is the wordplay.
'with' indicates putting letters inside.
'sovereign' becomes 'er' (Abbreviation for Elizabeth Regina).
'to invest' becomes 'tracing' (I can't explain this - if you can you should give a lot more credence to this answer).
'er' inserted within 'tracing' is 'TERRACING'.

'finding' is the link.

Can you help me to learn more?

I've seen this clue in The Telegraph.
Want a hint initially instead of a full solution? Install my app