Scottish roundup- Celtic go 12 points clear as Rangers slump at St Mirren - Scottish Premiership

Celtic stroll to 4-0 win over Motherwell while rivals slip Aberdeen hammered at Kilmarnock as slide goes on Celtic stretched their lead at the top of the Scottish Premiership to 12 points after their 4-0 Boxing Day win over Motherwell was followed by Rangers slumping to a 2-1 evening defeat at St Mirren that left their manager, Philippe Clement, lamenting their below par mentality. Earlier, Brendan Rodgerss side had eased