Go up to intercept undesirables over there (4)
I believe the answer is:
rise
'go up' is the definition.
(I know that rise is a kind of go up)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for rise that I've seen before include "Hill" , "Pay increase" , "more money" , "Growth" , "Ascend" .)