Swiss city and canton (6)
I believe the answer is:
geneva
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">swiss city and canton</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for geneva that I've seen before include "Juniper flavoured spirit - Red Cross HQ" , "Swiss city housing the Red Cross headquarters" , "European city" , "Avenge (anag) - type of gin" , "Calvin's city" .)