For example, if you are applying for a nursing job, you might share that you are not particularly adept at conducting group presentations. In this case it will be critical to underscore your strength in one-on-one communication with patients, while providing an example of your difficulty with presentations to large groups.
Mention Skills You Have Improved
Another option is to discuss skills that you have improved upon during your previous job, so you are showing the interviewer that you can make improvements when necessary. You can sketch for employers your initial level of functioning, discuss the steps you have taken to improve this area, and then reference your current, improved level of skill.