how about a snapshot so we can see the "severity" of the overexposure?

You may be able to recover a little by adjustment of brightness and contrast, but essentially what is burnt out completely is gone forever.

In future, if the sun suddenly pops out, wait for the automatic brightness control to adjust before panning further, or retake the scene again.

The same problem can occur if you are panning and the area of bright sky is changed too quickly.

I had a similar problem w/ a multicam shoot a couple of weeks ago where the sun was setting and the camera didn't adjust to well and a certain section of the scene was over exposed.

You can split the scenes that are over exposed and copy them to another track.
-if the over exposure is the same over all the clips adjust the brightness and color corrections at the track level. If the brightness varies over different events then brightness and color correction will need to be applied to each event BUT all you have to do is use FX chain to get the scene correction in the ballpark and fine tune the adjustment.

Replace/combine the over exposed scene with the corrected one or create a mask w/ feathering that outlines only the corrected portion.

If the shot is steady you can have the mask mimic a shadow line.

Thanks, I will try what you suggest

Also, try adding this FX chain:

Invert > Levels > Invert

Then go to the Levels FX and adjust the gamma slider. This will tame the overexposed whites without affecting the mid and dark tones. If this doesn't work, it is likely that the image was so overexposed that it clipped and there is no information to be retrieved.