Answer: lesse

AnswerCrossword Clue
LESSESmaller: obs.
LESSE50-mile Belgian tributary of Meuse River.
LESSERiver in Belgium.
LESSETributary of the Meuse.
LESSERiver through the Ardennes.
LESSERiver into the Meuse.
LESSEMeuse feeder
LESSEFlower in Ardennes