Downside

The answer to the crossword question “Downside is CON” is most likely “DRAWBACK“. The word “downside” indicates something negative or undesirable, while “CON” likely refers to the word “conflict,” which is often associated with negative situations. Taken together, these clues suggest that the answer is a synonym for “disadvantage” or “negative aspect“. “Drawback” fits this definition perfectly, as it is defined as “a disadvantageous feature or characteristic.”