What marchers may do at the station (4)
I believe the answer is:
halt
This might be a double definition.
'what marchers may do at' is the first definition.
The definition suggests a singular noun which matches the answer.
'station' is the second definition.
(I've seen this before)
'the' is the link.
Can you help me to learn more?
(Other definitions for halt that I've seen before include "Falter - stop" , "Cease" , "Stop; minor station" , "Small railway station" , "Stop, small station" .)