This is properly very, very easy, but now I give up after searching and trying all different things:
I need to remove an ARTIST field containing a given artist, but leave the other ARTIST fields alone.
I have a classical album where the different tracks have different ARTISTS, and I just want to delete / remove one ARTIST if it exits on some tracks.
If I open 'Extended Tags'-view it's very easy just to click the red cross on that ARTIST for each track, but I'm sure there is a specific line for that action 'Remove field'.
I tried 'REMOVE FIELD' - ARTIST=(all sorts of combinations for that artist), but clearly I'm doing something wrong.