Answer: MOATED

AnswerCrossword Clue
MOATEDProtected, as a castle
moatedMOAT, to surround with a water-filled trench
moatedchannel resembling a moat (as about a seamount or for confinement of animals in a zoo)
moateda deep and wide trench around the rampart of a fortified place (as a castle) that is usually filled with water
MOATEDLike many a protected castle
MOATEDLike a fortified castle
MOATEDLike some castles and zoo exhibits
MOATEDLike some fortresses
MOATEDLike many a castle
MOATEDLike most castles
MOATEDLike a castle
MOATEDLike old castles
MOATEDThe "... grange," where Mariana languished.
MOATEDProtected, as Torquilstone Castle was.
MOATEDHaving a protective ditch.
MOATEDSurrounded by a ditch.
MOATEDLike some zoo exhibits
MOATEDLike some castles
MOATEDSurrounded by a wide ditch