Need help replacing kitchen sink hose

The metal hose started leaking, and I need to get it replaced. The end that is connected has this clip. It turns but doesn't unscrew. Is there a way to take this off? Should I be trying to take this off at another place?

Edit: Adding picture of hose and clip. The clip is the purplish looking thing that connects the flexible hose to the stiff hose. Picture of hose and clip