Financier from Helsinki, say (10)
I believe the answer is:
capitalist
'financier' is the definition.
(thesaurus)
'helsinki say' is the wordplay.
I cannot quite see how this works, but
'helsinki say' could be 'capital' (helsinki is a kind of capital) and 'capital' is present in the answer.
The remaining letters 'ist' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'from' is the link.
Can you help me to learn more?
(Other definitions for capitalist that I've seen before include "Marx's bourgeois - a static lip (anag)" , "business person?" , "Seeker of profit in business" , "businessperson, maybe" , "Free enterprise supporter" .)