Answer: moats

AnswerCrossword Clue
MOATSCanals for castles
MOATSSiege deterrents
MOATSObstacles for marauders
MOATSDeep ditches
MOATSCastles' barriers
MOATSProtective rings
MOATSDrawbridges cross them
MOATSCertain trenches
MOATSKronborg Castle features
MOATSCastle defenses
MOATSCastle-defending ditches
MOATSWatery fences?
MOATSFosses
MOATSFortress ditches
MOATSDefense ditches
MOATSCastle features
MOATSDitches around castles
MOATSDitches for ducal domains
MOATSProtections for princely palaces
MOATSWatery trenches
MOATSProtective waterworks
moatsMOAT, to surround with a water-filled trench
moatsdeep, water-filled ditch around a castle
MOATSRings of water around castles
MOATSDeep defenses
MOATSPerimeter defenses
MOATSFeatures of many modern zoos
MOATSSome zoo barriers
MOATSCastle fortifications
MOATSZoo confines sometimes
MOATSCastle visitors' hurdles
MOATSCastle rings
MOATSCastle guards
MOATSWatery castle ditches
MOATSCastle barriers
MOATSWatery castle barriers
MOATSThey're crossed by bridges
MOATSTokyo Imperial Palace features
MOATSThings that drawbridges bridge
MOATSZoo barriers