Stations spies around … (5)
I believe the answer is:
stops
'stations' is the definition.
(I've seen this in another clue)
'spies around' is the wordplay.
'spies' becomes 'spots' ('spot' can be a synonym of 'spy').
'around' shows that the letters should be reversed in order.
'spots' written backwards gives 'STOPS'.
(Other definitions for stops that I've seen before include "Halts" , "Discontinues" , "Ends" , "Ceases" , "Prevents" .)