The Application page is available but the steps is a bit complicated, so I didn't share it previously. I should have mentioned it yesterday but that was 3am in the morning so I missed that, sorry for my negligence.
1. Swipe from left to right to pull out Application Menu, Select Third Party Application to enter Application Drawer, Click ES File Explorer to access Local Memory
2. Swipe Left or Right until you arrive the Homepage screen of ES File Explorer, select APK
3. Select User Apps at control area
4. Select System Apps from pop-up menu
5. You'll arrive at the App Manager page now, scroll up and down to find the app you need. In this case, you need to look for Google Play, Select and Hold the Google Play icon until the app is selected and an quick menu will display at the bottom of the screen, select "More"
Select Property from the pop up menu
You should arrive at the Application page of Google play, scroll down and you'll find the Clear Cache option.
Silvia (Cayin Support) has tried to clear the Cache but it won't stop the "Unfortunately, Google Play services has stopped" problem. This is expected because one of the page I quoted yesterday confirmed that they need to "Uninstalling updates of Google Play Store app" before the situation is getting better. We are now waiting for our Technical Service to conduct further investigation.