How to go from capitals of Spain, Russia, Qatar and Peru. (4)
I believe the answer is:
stop
'peru' is the definition.
The definition and answer can be both locations as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'how to go from capitals of spain russia qatar' is the wordplay.
I cannot really understand how this works, but
'to' is within the answer.
This may be the basis of the clue (or it may be nonsense).
'and' is the link.
(Other definitions for stop that I've seen before include "Come to an end" , "high card in bridge" , "Standstill" , "Withhold large amount raised" , "as per instruction" .)