You can apply for a Tier 5 (Religious Worker) visa if:
you want to do religious work - eg preaching or working in a religious order;
you’re from outside the European Economic Area (EEA) or Switzerland;
and you meet the other eligibility requirements
You need to be sponsored - ie have a certificate of sponsorship from a licensed sponsor - before you can apply to come to the UK to work.
The work you do in the UK must relate to your sponsor organisation’s work.