WordPress plugin: Is there any way to add an action to "x" button in the left of each tag?

Question

Hi, I'm working on WordPress plugin which generates related tags and allows user to add/remove them. There is Post Tags box in the right side bar in the admin page. Once user types terms in the text box and presses Add button the term will be listed below with "x" button.

I tried to hook jquery function into that "x" button but it just calls parseTags function only, which is tagBox class provided by WordPress.

Is there any way I can register functionality into the "x" button?

Thank you,