Middle point (6)
I believe the answer is:
centre
'middle point' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for centre that I've seen before include "Middle, hub" , "Place in the 18 down" , "'Things fall apart; the ... cannot hold'/Yeats" , "Middle, core" , "'Things fall apart; the ... cannot hold' (Yeats)" .)