Selected answers from the Dumb SEO Questions G+ community.
Michael Martinez: No, it is NOT possible to do this. If you go looking you`ll find some blog posts that suggest a way to compare GSC data to 3rd-party ranking report data. Such analytical methods are amateurish and useless. Until such time as the search engines break out Featured Snippet performance data it doesn`t exist and cannot be estimated.
David Ogletree: There used to be a GA filter that would break down types of Google links but not sure if it still works
Neil Cheesman: Could it be `guesstimated` via the search terms in GSC? - not sure which position if any that a featured snippet would show as - assuming the traffic is there?