London perhaps first for the wealthy investor (10)
I believe the answer is:
capitalist
'wealthy investor' is the definition.
'capitalist' can be an answer for 'investor' (I've seen this before). I am not certain of the 'wealthy' bit.
'london perhaps first' is the wordplay.
'london perhaps' becomes 'capital' (London is an example).
'first' becomes 'ist' (ist resembles 1st).
'capital'+'ist'='CAPITALIST'
'for the' is the link.
Can you help me to learn more?
(Other definitions for capitalist that I've seen before include "rich man" , "Marx's bourgeois - a static lip (anag)" , "businessperson, maybe" , "Profit-driven person" , "business person?" .)