Remove city from world clock widget?

How can I remove a city from the word clock widget shown below?

Solution 1:

You can choose whatever cities you like as long as there are four of them :-)

Just click on city name you want to replace, choose new one using Search field or use drop-down list in pop-up window. Your new choice will be displayed instead of Apple default.

Solution 2:

It looks like we are not able to add or delete a clock at this time. Check this post from Apple Discussions :

FWIW, you cannot add or delete cities, only change which of four cities you wish to display.

The closest solution is to add a single city clock widget...