I've got a completed grid but, before I start the grid search, can I just get rid of this "hanging chad", as it were -
2d Short of bass, as a virtuoso might perform The Four Seasons? (4)
The answer is clear but I would appreciate help with the parsing, in particular the reference to 'short of bass'. I've tried adding 'bass' or B to my answer but don't get anything that relates to a 'virtuoso performance'.