Crossword Clue:

The mouth of a river or valley

AnswerCrossword Clue
RHINERiver, valley or wine
RUHRGerman river or valley
DELTABuildup at the mouth of a river
DELTAHANDLaborer near the mouth of a river?
SILTDeposit at the mouth of a river
LIMANBay at the mouth of a river