Record march (4)
I believe the answer is:
file
This clue is a double definition.
'record' is the first definition.
(I know that file is a more specific form of the action register)
'march' is the second definition.
(I know that file is a more specific form of the action march)
(Other definitions for file that I've seen before include "Set of related records kept together" , "Set of papers" , "Smoothing tool; organised data" , "Tool to hold documents" , "Cutting tool or line of people" .)