Answer: SMEW

AnswerCrossword Clue
SMEWSawbill
SMEWDuck that nests in tree hollows
SMEWCousin of a goldeneye
SMEWNorthern duck
SMEWGoldeneye relative
SMEWDuck with a large white crest
SMEWSmallest of the mergansers
SMEWSaw-billed duck
SMEWHootamaganzy
SMEWWhite-crested merganser
SMEWCousin of a hootamaganzy
SMEWSmallest merganser
SMEWHooded merganser
SMEWHootamaganzy's cousin
SMEWDuck
SMEWRelative of a ruddy duck
SMEWWaterfowl
SMEWDiving bird
SMEWOld-World duck
SMEWSawbill.
SMEWFish duck.
SMEWShort-billed merganser
smewan Eurasian duck
SMEWFish duck
SMEWDrake, perhaps
SMEWCertain duck
SMEWCrested diving duck
SMEWBlack-and-white duck
SMEWRiver duck
SMEWType of duck
SMEWTiny diving bird
SMEWWater bird.
SMEWCrested duck
SMEWSmall diving bird
SMEWSawbill duck
SMEWDuck variety
SMEWCertain merganser
SMEWCertain diving duck
SMEWWhite-crested duck
SMEWMerganser's kin