Should I clear cache for Google Play Services or will an app misbehave? I need more space and I saw somewhere that I can clear the cache for Google Play Services but I'm not sure if something will go wrong 

Help please!
Clearing cache for an app will never delete any important information, only data held to make loading images etc faster. Data, however, is often used to store important information.

If the app is using too much data, I would say that there probably isn't much harm in clearing it, but if the app doesn't store much data, there isn't much point.