Clue: An Alsatian night worker, who's paid after work? (9)
Answer: ANNUITANT
Explanation: An Alsatian night worker, who's paid after work? (9)
**AN **+ **NUIT** (Alsatian night) + **ANT **"Nuit" is the French for night, and Alsace is part of France, hence "Alsatian night"