Get to the top on Tyneside? (7)
I believe the answer is:
Here is my best explanation:
'get to the top on tyneside?' is the definition.
I can't tell whether this definition defines the answer.
'get to the top on tyneside?' is the subsidiary indication.
'get to the top' becomes 'scale'.
'on' is a charade indicator (letters next to each other).
'tyneside?' becomes 'ne' (region in North East of England).
(Other definitions for scalene that I've seen before include "Unequal-sided (triangle)", "(Of triangle) with each side of a different length", "In such a triangle", "not having evenly matched sides", "(Of triangle) with no sides equal", "Neither equilateral nor isosceles", "Not equilateral", "Describing a triangle with unequal sides", "(Of triangle) having three unequal sides" and "Having no sides for a match".)