The term 'CANCEL THAT DELETION' is often used in the editing process. The crossword solution for this term is STET, which is a Latin word meaning 'let it stand'. This phrase is used to indicate that an editor does not want to make any changes to a piece of writing. Therefore, when someone says 'CANCEL THAT DELETION', they are asking the editor to disregard any changes they have made and keep the original text as it was.