Being new to this, when you say clipped I think of the subject being cutoff. This picture you don't seem to be saying that, so what do you mean by clipped?
The above is an example histogram of a red channel that is clipping. You can see on the right side how the graph is piled up on the right. It usually means there are some reds that go beyond the range of the histogram but all get stuck at the highest value.
I hope that makes sense.
If you look at the red dress in the photograph, there is a large triangular patch that is reflecting a hot red, but there is no detail or gradient of color within it. When I captured the image, that triangular patch of color was outside of what I could capture with my camera settings at the time. I don't have any flexibility apparently during post since I captured on jpeg. I'm new to digital imaging on an expert level, I come from darkrooms, so a lot of this is new to me. But in the future I will be capturing on RAW and jpeg.