Voters tolerate changes around city (10)
I believe the answer is:
electorate
'voters' is the definition.
(I've seen this before)
'tolerate changes around city' is the wordplay.
'changes' indicates an anagram.
'around' is an insertion indicator.
'city' becomes 'EC' (the City of London postcode).
'tolerate' with letters rearranged gives 'eltorate'.
'eltorate' placed around 'ec' is 'ELECTORATE'.
(Other definitions for electorate that I've seen before include "Voters collectively" , "Voters in general" , "Everyone choosing" , "Constituency" , "Those qualified to vote" .)