Yes, you can take back a snap you sent. To do this, you’ll need to go to theSnapchat app on your phone and select the “take back” option. After doing this, your snap will be restored as if it never happened.
There is no clear way to tell if someone cleared your conversation on Snapchat, as the app does not keep track of what was said. However, some users may experience problems with disappearing messages if they have conversations with people they do not want to be seen by.