We finish entertaining street in fashionable area (4,3)
I believe the answer is:
west end
'fashionable area' is the definition.
(I've seen this before)
'we finish entertaining street' is the wordplay.
'finish' becomes 'end' (come to an end).
'entertaining' means one lot of letters goes inside another (inviting in, as for dinner).
'street' becomes 'st' (abbreviation).
'we'+'end'='weend'
'weend' enclosing 'st' is 'WEST END'.
'in' acts as a link.
(Other definitions for west end that I've seen before include "lots of entertainment here" , "London's theatreland" , "Part of central London" , "London theatre district" , "Fashionable part of London" .)