Hi bbjmcse,
Thanks for posting in Apple Support Communities! If you no longer see the Clock app on your Home Screen, you can add it back from the App Library:
Touch and hold the app, then tap Add to Home Screen (available only if the app isn’t already on the Home Screen).
The app appears on the Home Screen and in App Library.
Find more information about the App Library here: Find your apps in App Library on iPhone
When adding it back to your Home Screen from the App Library, you will be able to move it to the location you'd like and access it again from the Home Screen.
Hope that helps!