Hypothetically, a European setting where all the reallife folklore is true, including witches and trolls and so on.Oh, absolutely. I'm not saying that no fantasy Wiccans map to e.g. nature clerics or even druids or warlocks. This is irrelevant to the point I was making.
What I am saying is that if both fantasy Wiccans and fantasy Catholic priests can commonly map to Life Cleric (or Light Cleric or whichever) with literally identical mechanics despite very different religious cultures then it's not "culture" that makes them. Very different cultures make for identical mechanical representation.
Clerics might be fuelled by gods and divine power, or they might be by prayer and ritual energy, or have some other commonality. But the commonality can't be something that is different between clerics, the clericsl part of which is mechanically identical.
There are many saints, including miracle workers, some of them priests.
The Cleric would be a member of a specific church, with its local traditions, part of a regional diocese. Technically a "cleric" means a formal sacred responsibility, but this could be a priest, a nun, a deacon, someone appointed to bring food to the poor, someone appointed to be a librarian, a seminarian student, or a teacher, or anything really. Some appointed position that the community recognizes.
This particular "cleric" also happens to be a miracle worker. The miracles might involve various Cleric class domains. God is light. God heals. God visits the sick. God grants victory. Any domain is possible.