Communist march (4)
I believe the answer is:
trot
This could be a double definition.
'communist' is the first definition.
(short for Trotskyist)
'march' is the second definition.
The definition and answer can be both acts as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
Can you help me to learn more?
(Other definitions for trot that I've seen before include "A slowish run, perhaps by horse" , "Fairly fast pace of a horse" , "Horse's steady pace" , "Gait between a walk and a canter" , "Fairly brisk pace" .)