Jersey Summit (3)
I believe the answer is:
top
I believe this is a double definition.
'jersey' is the first definition.
(jersey is a type of top)
'summit' is the second definition.
(I know that summit can be written as top)
(Other definitions for top that I've seen before include "Pinnacle" , "premier" , "Peak; child's toy" , "Highest part" , "Upper side" .)