Point to odder shape, worn away (6)
I believe the answer is:
eroded
'worn away' is the definition.
('erode' can be a synonym of 'wear away')
'point to odder shape' is the wordplay.
'point' becomes 'e' (compass point).
'shape' is an anagram indicator.
'odder' with letters rearranged gives 'roded'.
'e'+'roded'='ERODED'
(Other definitions for eroded that I've seen before include "Worn away by time, wind or water" , "Eaten away" , "Wore away" , "Worn away, ground down" , "Worn away by weather or water" .)