My experience is that the zebra indicates clipping far below real clipping levels in raw.
that is exactly why there was a note (in the first reply in this topic) that it has to be combined with UniWB - then it is precise within 1/3 EV (or less) in Sony A7* series to indicate real clipping in raw... as checked with rawdigger.
settings are :
WB = UniWB
Creative Style = Neutral (contrast -3, saturation -3, ...)
Zebra = 100+
yes, green tint in EVF (Setting Effect = ON)