If you go to your Elite Clan Profile, you can make an emblem that will be shown next to your Clan Info. Go to Clan Manager at the very end click on "emblem" you will be given several little images that you can put together to make your emblem that represents your clan, such as skulls, rifles, flames, etc. As your clan ranks up higher, you will unlock more little images to create an image.

Hope that helps, for an example

here is the clan page I created so you can see how the image is displayed,

(It's the skull with 2 cross rifles)

https://elite.callofduty.com/connect/clan/view/175545

somebody reply to me pleeeeeeeeeeeaaaaaaaaaaaaaaassssssssssssseeeeeeeeeeeeeeee