Barrier on the way to financial district (4,6)
I believe the answer is:
wall street
'financial district' is the definition.
(I've seen this before)
'barrier on the way' is the wordplay.
'barrier' becomes 'wall' (a wall acts as a barrier).
'on' is a charade indicator (letters next to each other).
'the way' becomes 'street' (street is a kind of way).
'wall'+'street'='WALL STREET'
'to' is the link.
(Other definitions for wall street that I've seen before include "Financial district" , "Financial hub" , "part of Manhattan" , "New York finance centre" , "NY financial area" .)