Answer: riverbed

AnswerCrossword Clue
RIVERBEDWet bottom?
RIVERBEDDredging spot, perhaps
RIVERBEDArea between banks
RIVERBEDMississippi mud?
RIVERBEDBottom of the Grand Canyon.
RIVERBEDBottom of the Hudson.
RIVERBEDWadi.
RIVERBEDChannel
RIVERBEDBottom feeder's sphere, perhaps
RIVERBEDDredged area, maybe
RIVERBEDSite of deposits between banks
riverbedthe area covered by a river
riverbedthe channel in which a river flows or formerly flowed