Removing numbers, etc is the middle of a tag?

1970 - 001 - Simon and Garfunkel - Bridge Over Troubled Water
I need to remove the track number on about 5000 songs and just keep the year.
1970 - Simon and Garfunkel - Bridge Over Troubled Water
I know there are formulas for this. If someone could give me detailed instructions it would be so helpful. Thank you in advance. The year is in the filename only ni in the tag ! So I just need a string to edit the file names. RDS reads the filename, not the tag.

Is this about a tag field or the filename?

Filename for RDS on our streaming.

Which tag fields have you filled?
Because then it should be easy to to rename the files.

I have not renamed any of the file names yet. I am hoping to do it one big move. I do not need to change the tag names, just the filenames so that they will be seen correctly on RDS

Current filename
1970 - 001 - Simon and Garfunkel - Bridge Over Troubled Water

Wanted filename

1970 - Simon and Garfunkel - Bridge Over Troubled Water

So I assume that you have the relevant tag data.
Try Convert>Tag-Filename
Format string: %year% - %artist% - %title%
If this leads to empty filenames, then it would be advisable to import the data from the filenames first into tag fields with
Convert>Filename-Tag
Format string: %year% - %track% - %artist% - %title%
and then rename the file with the tag data as described for Convert>Tag-Filename.