If you are showing clocks in the Clocks palette pop-up menu, you can easily copy their times to the Clipboard.
Make sure your are showing clocks in the Clocks palette pop-up menu.
Click any clock in the Clocks palette, select the clock whose time you want to copy in the Clocks palette pop-up menu, and display its Copy Time submenu.
If needed, edit the format of the time you want to copy.
Press the Shift key to use either 12-hour or 24-hour time.
Press the Control key to show or hide seconds.
Press the Option key to show or hide the date.
Press the Command key in case the clock shows the time in a city and you wish to show or hide its time zone abbreviation.
Press the Function key to show or hide the city name or the time zone abbreviation.
To restore the default Copy Time format, choose Restore Defaults.
Choose the time in the Copy Time submenu to copy it to the Clipboard.