Related Clues:

• Defensive measure to tie game
• It has its ups and downs as a form of security
• Keep attachment for reasons of security
• Entry to castle may hinge on this
• One's down for admission to old castle
• Castle defence
• One may protect castle, and avoid losing game
• Spanner lowered into position
• It's up to one's opponents to get a point out of game
• Take out capo perhaps and keep protection
• Men would put this down to attract game
• Neither win nor lose game at entrance
• It spans a moat
• To tie game this may have been deployed in defence
• Stalemate with game that secures castle's defence