London, for example, wins one away from Uber — it reduces profits (7,5,3)
I believe the answer is:
capital gains tax
'uber it reduces profits' is the definition.
I can't judge whether this defines the answer.
'london for example wins one away from' is the wordplay.
'london for example' becomes 'capital' (london is a kind of capital).
'wins' becomes 'gains' ('gain' can be a synonym of 'win').
'one away from' becomes 'tax' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'capital'+'gains'+'tax'='CAPITAL GAINS TAX'
Can you help me to learn more?
(Other definitions for capital gains tax that I've seen before include "may reduce profits" , "that reduces profits" , "CGT in full" .)