Labels in JIRA is a "tag" field where it becomes a link so that users can select the same field value and they are grouped (and can be searched on). Is there a way to create a new customized field with this type of functionality?
Actually, as I've read the question, Jira already does that.
If you create a labels field (bear in mind there's already one there by default), then put things in it, then clicking on the name of a label in the issue view takes you to the issue-navigator with a search for "labels = <what you clicked on>" displayed...
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