Spinner at the summit (3)
I believe the answer is:
top
I believe this clue is a double definition.
'spinner' is the first definition.
(a spinning top)
'the summit' is the second definition.
('top' can be a synonym of 'summit')
'at' is the link.
(Other definitions for top that I've seen before include "The upper part" , "Crown" , "Highest part" , "Summit or spinning toy" , "Peak; child's toy" .)