Option to empty fields when data is unavailable from source

Is it possible to scrub or remove tags from files that should be empty following the musicbrainz database, but comes with some value prior to tagging?

For example, I tagged some files which contained a (wrong) composer, but the composer field in the MB database was empty. Therefore, the tagger didn't removed the composer-tag from the files. In my view, the tagger should remove the composer-tag from the file by default if it is empty in the MB-database

The issue names no files or tests. Start at the tagging path that handles fields absent from MusicBrainz data, then identify existing tests for tag removal; done means an existing composer value is removed when the source field is empty, with other fields unaffected.

Written by the indexing model from the issue text.