Some pin, or this point (5)
I believe the answer is:
north
'point' is the definition.
(north is a kind of point)
'some pin or this' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'NORTH' is hidden within 'pin or this'.
(Other definitions for north that I've seen before include "who is opposed to East-West partnership?" , "Top of most maps" , "Towards top of map" , "A 24 [STAR]" , "Lord -, PM; bearing" .)