Copper Age road men rebuilt (8)
I believe the answer is:
gendarme
'copper' is the definition.
(French police officer)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for gendarme that I've seen before include "French policeman has me in danger" , "continental copper" , "see in Paris!" , "policeman in Paris?" , "Law enforcer" .)