You might try this as part of your template: {author_sort:sublist(0,1,&)} which I use as part of my save to disk and send to device templates. I'm not certain from what you wrote if you want this to show in the calibre library list view or in a save to disk template. If you use a custom author sort column built from other columns, this should work for the calibre library view.
Edit: added image of custom author sort column.
Last edited by DNSB; 09-25-2019 at 02:47 PM.
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