the heter for gevinas akum (based on Tosfos) was paskened l'masseh by R. Solovetichik, among others
or, in other words, Rabbi Soloveitchik, among others, ruled as a practical matter leniently regarding g'vinas akum (otherwise kosher cheese that was produced by non-Jews), and this ruling was based on Tosafos.
- What was the leniency? I mean, the prohibition of g'vinas akum is a well-established one, and I'm sure Rabbi Soloveitchik (and the others) didn't do away with it altogether based on a Tosafos: I assume that, rather, they said it doesn't apply in some circumstances. What circumstances?
- What's their support (from Tosafos and/or elsewhere)?
- Which Rabbi Soloveitchik is this?
- Who are the "others" and what, if any, authorities have argued against this leniency or indicated one should not rely on it (at all, or to the extent Rabbi Soloveitchik and the others do)?