Climb north face of Everest made up of different sides (7)
I believe the answer is:
scalene
'up of different sides' is the definition.
I can't tell whether this definition defines the answer.
'climb north face of everest' is the wordplay.
'climb' becomes 'scale' (scaling is a kind of climbing).
'north' becomes 'n' ('N' can be a synonym of 'north').
'face of' suggests taking the first letters.
The first letter of 'everest' is 'e'.
'scale'+'n'+'e'='SCALENE'
'made' is the link.
Can you help me to learn more?
(Other definitions for scalene that I've seen before include "(Of triangle) with each side of a different length" , "(Of triangle) with no sides equal" , "Having no sides for a match" , "Describing a triangle with unequal sides" , "(Of triangle) having three unequal sides" .)