Yes there is. On lock screen swipe your finger down from the clock to reveal an arrow pointing up on the bottom it analogies your lockscreen shortcuts. Press and hold the clock and drag it to the trashcan. Then you can add another widget.
Sent from my LG-LS980 using xda app-developers app
Just add a standard clock widget to your lock screen. From your lock screen, click the '+' button (swipe left if you already have other widgets) and then unlock your phone to see a list of widgets. If you don't see a clock widget listed, download one from the Play store.