your histogram is correct and shows clipping but the clipping is not from exposure. Let me see if I can explain it better
I had an image in Adobe RGB space, 16Bit TIFF that was very rich in tones, it has very dark and very bright tones. The histogram was healthy and looks like pane #10
now I convert to sRGB 8Bit JPEG, what happens? the answer is some of the colors that were in the original no longer exist in sRGB. e.g. Adobe RGB (0,220,0) is NOT overexposed but this color does not exist in sRGB, so it gets translated to (0,255,0) sRGB as shown below. now it is looks clipped but the original was OK. In this case I would just look at the image and see if I am happy with how it looks as opposed to rely on the histogram. the histogram will look clipped because the color gamut is too wide for sRGB. If you go to the original and compress the color gamut you can prevent the clipping but the image loses its true colors, punch and appeal.
the diagram below shows this graphically. does that make sense?
Attachment 167192
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