Sharp point found by climbing mountain peak (3)
I believe the answer is:
neb
'sharp point' is the definition.
'neb' can be an answer for 'point' (I have seen 'The point' mean 'neb' so perhaps 'point' could also mean 'neb'). I am not sure about the 'sharp' bit.
'climbing mountain peak' is the wordplay.
'climbing' says the letters should be written in reverse (in a down clue, letters climb up).
'mountain peak' becomes 'ben' (Scottish term for a peak as in Ben Nevis).
'ben' backwards is 'NEB'.
'found by' acts as a link.
Can you help me to learn more?
(Other definitions for neb that I've seen before include "Nose" , "breather?" , "version of Bible" , "The point" .)