When one separates the "first tithe", which needs to be given to a ben Levi, may he give it to a kohen instead on the grounds that he is of Levi lineage?
Would this at least work b'di'avad to relieve the rest of his crop of tevel status (assuming t'ruma had been separated as well) since the kohen could use some part of what he received for ma'aser as t'rumas ma'aser himself (citation needed)?