Answer: queensberry

AnswerCrossword Clue
QUEENSBERRYMarquis of ...: Wilde's
QUEENSBERRYCertain rules.
QUEENSBERRYCompiler of certain rules
QUEENSBERRYBoxing's Marquis of ... rules
QUEENSBERRYMarquis of ... rules, in boxing