Highest point or level (8)
I believe the answer is:
pinnacle
I believe this clue is a double definition.
'highest point' is the first definition.
(I've seen this before)
'level' is the second definition.
(pinnacle is a kind of level)
(Other definitions for pinnacle that I've seen before include "The highest point, say of fame" , "The highest point, peak" , "Place inn on the very top" , "High pointed piece of rock" , "Height of success" .)