Exceed; mountain route (4)
I believe the answer is:
pass
I believe this is a double definition.
'exceed' is the first definition.
(I know that exceed can be written as pass)
'mountain route' is the second definition.
(I've seen this in another clue)
(Other definitions for pass that I've seen before include "Go by; succeed in (an exam)" , "Approve; mountain route" , "Overtake; mountain way" , "Authorise; overtake" , "Overtake; permit" .)