I like to distinguish target panic, which seems specific to shooting sports, from anxiety or clutching, which has a much broader impact. Both are caused by the mind, but target panic seems triggered by the subconscious, while clutching is conscious.
Target panic arises when there are artificial barriers to completing the shot. Artificial meaning they are not related to any lack of strength or skill on the part of the shooter, nor are they necessarily related to any feelings of anxiety. Archery symptoms would typically be inability to come to full draw without prematurely releasing the arrow, or inability to achieve the desired target picture without prematurely releasing the arrow. I believe similar things occur in other sports, such as flinching in gun shooting sports. Nothing I have read indicates to me that we have a complete understanding of the causes or cures for this problem. On the bright side, virtually everyone who is persistent seems to eventually find something that works, although methods that work for some people may not work for other people, and things that work for a while may not work forever.
Anxiety, or clutching, is caused by conscious self-imposed mental pressure to perform. The more the pressure, the higher the anxiety. This can occur in any activity where success is in doubt, such as sports, business, and even social activities such as asking someone out on a date. Symptoms include inability to achieve performance potential, or in some cases, even to perform at all. The causes and cures for anxiety are much better understood than target panic, if equally elusive to apply. Anxiety predictably succumbs to mind training or desensitization techniques. An example of a mind training technique is training for increased concentration; the pressure is still there, but the conscious mind is able to focus on something else for long enough to complete the task at hand. An example of desensitization would be if one feels pressure in a tournament situation, shooting tournaments more often should reduce the sensation of pressure. A similar densensitization could be achieved by voluntarily embracing the anxiety rather than attempting to avoid it. Interestingly, techniques for reducing anxiety are either ineffective or actually may increase the symptoms of target panic.
Target panic and anxiety may exist separately, together, or not at all. In other words, one person may experience target panic and/or anxiety from the same experiences that have no negative effect on another person.