This is what happens when you try to export your vector art from illustrator. You realise the image exported out isn’t the same as the artboard or there are ugly white spacing around the image. So why does this happen? When you export an image, illustrator will calculate the bounding box of the whole area taken up by your image including the clipping mask and set that as the image area. This normally leaves a lot of white spacing around the image.
The solution to this problem is simple. Draw a box in the canvas and define it as the crop area by going to Object>Crop Area>Make. This will define the crop area. So when you export our the image will show only the crop area.