Clergy really ought not worry, at least not for the time being (except perhaps military chaplains.)
The law sees a significant difference between a clergyman performing a religious function and a florist arranging flowers or a photographer taking pictures. The former are protected by the Free Exercise Clause. The latter are not.
For now!! Anyone who trusts it will sty that way is foolish, as these people are redefining/shredding the Constitution daily!