Nice policeman? (8)
I believe the answer is:
gendarme
'nice policeman?' is the definition.
(a policeman from Nice would be gendarme)
This is the entire clue.
(Other definitions for gendarme that I've seen before include "continental copper" , "An arresting Frenchman?" , "French copper" , "policeman in Paris?" , "Soldier on police duty" .)