I agree there really isn't anything else it could be and of course wondered if it was in a hard copy version of Chambers but it's not listed online. It's certainly not recognised by the Kennel Club either but at the end of the day it's just a quiz answer.
It seems like the start of World War 3!!!! I'm stuck on "Good for getting one's own back " (9) which is probably me just being thick - so if anyone can help when hostilities cease LOL !!!