Crossword Genius

In making these profits, London maybe catches up (7,5)

Ross

I believe the answer is:

capital gains

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'london maybe catches up' is the definition.
I can't judge whether this definition defines the answer.

'in making these profits' is the wordplay.
'in making' becomes 'capital' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'these profits' becomes 'gains' ('gain' can be a synonym of 'profit').
'capital'+'gains'='CAPITAL GAINS'

Can you help me to learn more?

(Other definitions for capital gains that I've seen before include "One pays tax on these" , "target of 17, 8 [CHANCELLORS STATEMENT] - with 6a" , "Profits from investment sales" , "Profits from the sale of assets" , "Taxable profits" .)

I've seen this clue in The Times.
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