Help on a creating a clincher for my conclusion paragraph on my essay? or clincher examples?

My topic is about the negative and positive effects of video games.

Within it i discuss the possible disadvantaging lifestyle (sleep deprivation, health risks, etc)

I also discuss how it may be a good educational use (using strategy and logic, provides life preparation... such as how IRL events may need the assistance of hand-eye coordination, etc)

Therefore, can anyone help me out? I have my conclusion paragraph complete, yet my instructor advised me how there's no clincher included. I have looked at two other examples, but don't know how can I fit a clincher decently in mine. Help??