Dismount in cycling arena in outskirts of Dortmund (7)
I believe the answer is:
descend
'dismount' is the definition.
(I've seen this in another clue)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for descend that I've seen before include "Sink" , "Move downwards" , "Go down" , "Move downward" , "Climb down" .)